For example, don't buy this month's crypto like
>>60666502. There's a small chance it really is continuing, but in most cases, this will just halve your precious 250k.
The most sane advise is probably to buy emerging market indices with a few select new companies, and treat crypto as a big emerging market where you buy the index (not BTC, that's a cult by now, which says everything you need to know). That will give you the 4x within a decade. And that's good enough.