Bitcoin could really help reduce poverty and inequality, but it's not a simple fix. It has some great possibilities, but also some big problems.
The good things are that Bitcoin could help people who don't have bank accounts get access to money. This would let small businesses grow and people could easily send money to each other, even across countries. Sending money home to family would be cheaper and easier. It could also make things more transparent, so there's less chance of corruption. Basically, it could give people more control over their own money.
Anybody that can own Bitcoin can have access to a bank account hence it's not an excuse to say you didn't have access to bank account and that's why you're poor. Having access to bank account doesn't make you rich too hence it doesn't make any sense what you're saying. Bitcoin investors had gained a lot from Bitcoin and it has help many of them to acquire wealth but before they invested in Bitcoin, they were already not poor but have some money to invest. It could be that they weren't that wealthy but you won't call them poor because anybody that's poor, will find it very difficult to remove money to invest into Bitcoin when they haven't eaten and done some other things that the money can be useful for. You can't make money from.Bitcoin without investing some money first hence Bitcoin isn't what you think it's, with your explanation.