i personally use it as a passive, diversified savings instrument, but i don't mess with altcoins or trading. most crypto is actually exceptionally bad for anonymity, worse than cash, and the proportion of criminal activity it facilitates is 1-2 orders of magnitude lower than the conventional economy: https://www.forbes.com/sites/haileylennon/2021/01/19/the-fal...

it is in fact so bad for anonymity that i suspect you have not read much about it!

i don't disagree that it features a lot of hype bubbles and ridiculous speculation, but that's hardly specific to cryptocurrency. how's your local housing market been looking lately?