If your concern is security of your Bitcoin, then what you should do is choosing good wallet. Hardware wallet (such as Ledger Nano S and Trezor One) is best choice if you could afford them, you just need to backup the mnemonic phrase (sometimes also called recovery phrase or seed phrase) and store the backup on secure location.
Agree. Even so, it is better to use a Segwit address in almost every situation.
I don't have funds in Legacy addresses anymore.
The only downside of segwit addresses is that they do not allow to sign messages. Only Electrum does, and its signature is not recognized by Bitcoin Core.