Electrum is indeed the best Bitcoin wallet and I have also used it for a long time, because I think Electrum is very safe and easy to use (since I used it until now I have never had any problems), but I can also recommend you Trust Wallet, because in my opinion Trust Wallet is also very good for storing Bitcoin and in addition to storing Bitcoin, you can also store altcoin on Trust Wallet, so that it doesn't make you need a lot of wallet to store all coin you have, besides that in my opinion Trust Wallet is also very easy to use, because you can download Trust Wallet on Android and iOS, so it allows you to use Trust Wallet anywhere and anytime.