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But i feel that crypto and cash are real money the bank balance on my bank account i feel little sceptical yes banks are safe but still i need that feeling that at least some of my funds are under my own control.
You have control over the cash and crypto... as far as the money we keep in the bank, we have control as well, but not total. The bank can limit/deny our access to that money if they think there is a reason for doing so. Of course, it doesn't happen that often and it doesn't happen everywhere, but there have been cases in the world (especially during the coronavirus).
Well, it's simple actually... banks are the "middleman", a third-party service, and with crypto, the need for that "third-party service" is eliminated. We can store/keep coins, we can move them as we like, and wherever we like, we can adjust fees, so basically we can do alone most things that banks do.
That's the thing I always think about when I imagine making a lot of money in the crypto world, like lets assume for a moment that you got lucky and someone sent you 500 million dollars, why would they of course but this is just assumption to show something else.
If you had 500 million dollars in your wallet today, how would you turn that into money in your bank account? That's not easy at all, you would need to test out small by small, plus most exchanges do not let you do that all at once, so you need to do it slowly, and you need to make sure that you do not send all of that to an exchange or something that will keep it, you send like a million, and then you send to your bank, and then you take care of the taxes, and then you do it again 500 times until it's all done, and you will face a million problems while trying. So all in all, having 500 million in crypto, trying to turn that into fiat in your bank account is quite hard when you think about it.