Argo Blockchain shares: will they help me retire early? Enter Your Email Address “This Stock Could Be Like Buying Amazon in 1997” Image source: Getty Images. Paul Summers | Monday, 11th January, 2021 | More on: ARB Click here to claim your copy now — and we’ll tell you the name of this Top US Share… free of charge! I’m sure you’ll agree that’s quite the statement from Motley Fool Co-Founder Tom Gardner.But since our US analyst team first recommended shares in this unique tech stock back in 2016, the value has soared.What’s more, we firmly believe there’s still plenty of upside in its future. In fact, even throughout the current coronavirus crisis, its performance has been beating Wall St expectations.And right now, we’re giving you a chance to discover exactly what has got our analysts all fired up about this niche industry phenomenon, in our FREE special report, A Top US Share From The Motley Fool. Argo Blockchain (LSE: ARG) was last week’s most popular buy on online platform Hargreaves Lansdown, pushing electric vehicle maker Tesla and tech-focused FTSE 100 member Scottish Mortgage Investment Trust into second and third spot respectively.Based on recent share price gains, I can’t blame investors for getting excited.5G is here – and shares of this ‘sleeping giant’ could be a great way for you to potentially profit!According to one leading industry firm, the 5G boom could create a global industry worth US$12.3 TRILLION out of thin air…And if you click here we’ll show you something that could be key to unlocking 5G’s full potential…Argo Blockchain shares: retirement-makerArgo’s share price was just over 10p one month ago. When the market closed last Friday, it was 117.5p. A few days earlier in the week, it was as high as 135p a pop. I don’t think it’s a stretch to say that at least some of those holding the stock prior to December might now be contemplating taking retirement earlier than they originally planned.The huge rise in valuation over recent months isn’t hard to fathom. As the only cryptocurrency mining company listed on the LSE, it was perhaps inevitable that the stock would prove popular as Bitcoin hit the headlines again. If anything, the spectacular performance of Argo Blockchain shares has been overdue. In case you hadn’t noticed, the cryptocurrency was one the best ‘investments’ you could have made when markets crashed back in March 2020. The price of a single coin was around $5,000 back then. It was over $41,000 last Friday, helped by ongoing concerns over the global economy and the prospect of inflation.But would I buy now?Since Argo is a listed company and not ‘hackable’ like some digital wallets, I’d be far more likely to buy its shares over Bitcoin. Even so, I’d be cautious about throwing too much cash at the shares right now. Things could get very volatile over the next few days and weeks as profits are inevitably banked. Indeed, if the Bitcoin price is anything to go by, holders should be ready to endure double-digit percentage gains and falls. Such is the fate of any company whose earnings depend on a speculative asset it has no control over.It’s particularly worth highlighting that ARB was also the most popular sell by Hargreaves Lansdown clients last week. For me, this suggests your average holder of Argo Blockchain shares isn’t in it for the long term. This situation isn’t helped by Argo’s ‘free float’ either. This is the percentage of shares that are available to buy and sell on the market. At a little under 74%, this is less than the typical FTSE 100 stock whose free float is usually very close to 100%. The lower the free float, the more likely the price is to rocket and tank thanks to fewer trades made and limited stock available.No one knowsOf course, no one knows where Bitcoin is going over the next week, let alone the rest of 2021. Its price could double from here or sink to zero. We’ve no idea. The same goes for Argo Blockchain shares. Traders dreaming of retiring early and possessing the right level of risk tolerance may be fine with this. My concern however, is at least some retail investors haven’t stopped to question their own risk profile and may allow greed to take hold. Herein lies the danger.Good luck to those considering Argo Blockchain shares and congratulations to those already holding. I’ll stick to high-quality UK stocks that I can hold for years as my strategy for bringing retirement closer. That’s the Foolish way. Our 6 ‘Best Buys Now’ Shares Renowned stock-picker Mark Rogers and his analyst team at The Motley Fool UK have named 6 shares that they believe UK investors should consider buying NOW.So if you’re looking for more stock ideas to try and best position your portfolio today, then it might be a good day for you. Because we’re offering a full 33% off your first year of membership to our flagship share-tipping service, backed by our ‘no quibbles’ 30-day subscription fee refund guarantee. Simply click below to discover how you can take advantage of this. Paul Summers has no position in any of the shares mentioned. The Motley Fool UK has no position in any of the shares mentioned. Views expressed on the companies mentioned in this article are those of the writer and therefore may differ from the official recommendations we make in our subscription services such as Share Advisor, Hidden Winners and Pro. 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"Argo Blockchain shares: will they help me retire early?"