Being your own bank – the hassle of securing your Cryptos

Let’s say theoretically you have 3 mio dollars in crypto (I don't, but to make this whole thing more pressing).
All your wealth.

Now you can leave it on an exchange, login with your password and 2 factor authentification. See the worth, have all coins nicely together, be able to buy and sell and send.

But everybody says ‘don’t leave it on the exchange’.
Because exchanges get hacked. Or hack themselves. Or get bankrupt (?).
Or something else that is weird.

Let’s say theoretically you have 1 mio dollars in crypto.
How do you secure it?
Concretely?

I guess being your own bank kinda sucks.

I want to find a good security strategy.
Links and tips welcome.


Eg Paper wallets
Nice, but where do you keep the paper?
In a safe? In your house? House burns down?
You remember the seed and check if you remember it every morning?

Ledger / Trezor.. hardware wallet.
Again.. you keep that in a safe?

One multi-coin wallet to rule them all? Where you learn the seed so you can repeat it in your sleep?
One wallet for each coin?
One wallet for about each 20k?

Thanks for comments