Are there any flaws?

I have been following this sub for some time now. I wouldn’t say I’m an expert in BTC by any means and I still learn things every day (mostly reading stuff on here). All criticism from people who are skeptical about the idea of BTC being adopted, I see a very good argument proving why BTC is superior to the current financial system. So to the pro-BTC people, are there any flaws or problems that could hold it back from being adopted? Sorry for any grammar mistakes