Yeah, it's not like I can go on to /r/bitcoin and read multiple dedicated screeds along the lines of "I'm recommending my friends to invest savings in BTC for retirement". Whereupon someone replies "They should keep something in a Roth IRA for diversity", and the OP comments, "What's a Roth IRA?"
Yes, there are sophisticated investors.
But in a lot of cases, the only thoughts going through peoples heads is "Get Rich Quick". There's more discussion of "what color Lamborghini am I buying?" than anything else on those forums right now than anything else. Well, beside 'HODL! HODL! Even if the market corrects $10,000 tomorrow, HODL!'.