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 think is very difficult, electrum become famous wallet for easy and believe, not only that electrum also have licenses good for programming. if the OP wants to create a wallet without a GUI then OP should also have the same licenses as programmers electrum.