What do you think is the biggest obstacle to crypto mass adoption?

While things have come a long way from sending a random miner USD via a bank transfer to get some BTC, or trying to make sense of mining ETH (back in the days), we are still at a stage where crypto is not accessible to the masses. And by masses I mean your grandma, or your non-tech savvy friend, etc.

Bitcoin was meant to be used as an actual currency, and while you can actually spend it in a lot of places, it isn't particularly easy.

Platforms like Crypto.com are doing a lot to shorten that bridge, but it's still not enough.

With uncertainties in taxation rules, and further regulations, I feel there's a long way to go still. What are your thoughts on this?