Best Way to Store Bitcoin

Sorry if this is a commonly asked question but I want to know what the best way to store BTC is? I know a hard/cold (is there any difference between a hard wallet and a cold wallet) is a common practice, but can’t these easily be lost/stolen? Would it be safer/easier to just hold BTC on Venmo or cash app? I just want to know the facts before heavily investing in Bitcoin. Also if you are a hard/cold wallet user could you please recommend the wallet you use/like? Also I live in the US.

Thanks!