For multiple-network supported wallet, I use metamask and trustwallet. Their securities are just normal for a crypto wallet. As long as you are the only one who knows its seedphrase/private key, then your assets are safe.
Metamask or trustwallet both are hot wallet, connected directly with online. I don't think they are safe enough. There are hundreds of example of people getting tricked because they use this kind of hot wallet to store their crypto. These are indeed one of the most risky wallet. No matter what, as long as your wallet is in online, it's nit anymore safe.
I use this types of wallet only for regular transaction purpose with a small amount of crypto asset but never used to store my asset for long term nor to store even a decent amount for few days.