I will share my experience in securing my altcoin. I secure my altcoin by storing it in a crypto currency wallet and not storing it on the exchanger. In my opinion, crypto currency wallets are safer to use to store coins than exchangers. Then I activated all the security features on the wallet like the 2FA feature. I didn't forget that I made sure that the email connected to my wallet was not automatically connected with someone else's email that I didn't know. Lastly, I always update my security periodically so that other people cannot guess the password that I use.