Not that I am agreeing or disagreeing with the strategy here but comparing it to stocks really isn't fair. The top ten or twenty stocks by market cap are typically already fairly valued unless there has just been some sort of crash that took out the good with the bad. This would be more like buying into the top 20 tech companies is 1998. The bigger problem is that even if you bought a millionth of the supply of Amazon in 1998 your 5k would have become 500k but it would have taken you 20 years and inflation would have crushed your gains. I think for this strategy to work you need to truly believe that blockchain and cryptocurrency will displace major stores of value AND that one of the current top 20 will be the ones to do it and that is still a huge gamble.