We are still early

I was in school and someone mentioned bitcoin. I asked if they were involved and they said no not really though they thought it was going to be the way. I mentioned that banks were already offere offeredING etfs and they said that would be the best way to do it. I said you don't really need the banks and just self store your bitcoin essentially making you a bank. He then went on a tangent of how we need banks and how they're necessary even with bitcoin. Kid started getting mad when I said we don't need them and we need to lose them. We are still very early guys people have no idea wtf they are talking about