What made the GFC such a massive bubble was how much the financial system was woven into Mortgages/CDOs. Crypto is not there yet, right now it could pop and you'd hear a few regretful stories and friends who lost a few hundred on the "Doge", but it wouldn't be a widespread disaster. Once you start seeing apps utilizing DeFi to enable average "fools" to purchase equities, fund home/auto/college loans etc that will signal a bubble with vicious potential.
Dogecoin purchases via Robinhood is probably the easiest we have right now to getting the average fool to trade their currency for memes, but that's still a small subset of gambling.