[charlesdm]

Honestly, and this is coming from a Bitcoin bear, it will probably generate outsized returns in comparison to the S&P500 over the next 2 to 4 years. If it truly is a bubble then it will have a long way to run. The market cap at the moment is tiny, but probably too high to disregard now, and if institutional money starts buying in, it can probably easily go 10-20-30x again.

Don't forget it's still relatively hard for average folk to purchase crypto. But once you have acceptable ETFs and funds that you can purchase at a click of a button through your brokerage account -- a lot of people (and pension funds!) will probably allocate 1-2% of their portfolio to crypto. That is 1-2% of $300tn or so, or 30 to 60 times the amount of money in the space today (in terms of market cap).

If you think this bubble will run for a while, then I also think it's not unreasonable to assume you can multiple your initial investment by 10x by investing in either Bitcoin or Ethereum. But that's my opinion (and this is obviously not investment advice).

Whether it'll be around in 40+ years, I don't dare make that bet. But no one is saying you can't move money around to the better investment opportunity at a specific time.