If in late 2021, I had two friends Alice and Bob, who were enthusiastic and so far successful in shoveling money into TSLA and BTC respectively, and who are both telling trying to convince me to follow their lead, how can I judge their suggestions? I can look at Tesla's quarterly reports, and rabbithole into information about other company's EV efforts, and see analysts try to make projections about future revenue. I'd be left with a lot of uncertainty, but I can make a good faith effort to try to judge what an appropriate price is based on future earnings, and whether the current price is too high or too low. With BTC one doesn't have that. Even if prices had increased lately, how would one judge whether that was high or low relative to where prices _should_ be? Today, after a period when prices have fallen a lot, are they high still? Would $10k be too high? $1k? About a decade ago it was roughly $11 and 2 years before that it was $0.20. There's no way to judge value, only price.