Would developing your own Bitcoin Wallet be safer than using known ones like Electrum? It would obviously be much simpler, with no GUI, worse overall security but no one could get their hands on its source code. I have enough programming experience myself to make it but I'm wondering if it even makes sense to do so.
Thank for your help!
I wouldn't suggest you to do that. I can't say that there is absollutely no sense in that, if you are a good programmer you can make it very simple and useful. The question is: does it worth that? I mean, it is a huge risk, even though you have skills you must remember that there are other programmers
who have skills and they seek for vulnerable systems. So, I think it is better to use not as much convenient wallets, as you wished it to be, but at least know that your money is safe.