Is Bitcoin Best For Investing money ?

While you're banned, I'll just share my opinion for anyone else who's interested.

Storing BTC is as safe as you want it to be.
If you're using external wallets on websites, your safety is generally much lower than storing it locally.

Using a hardware wallet like the Nano Ledger S is a step in the right direction to increase your safety.

As for investing in BTC, its definitely an interesting and potentially profitable investment, but there are various altcoins around with much more potential to make profit.
I'd suggest looking around yourself, personally I'm down in VeChain now.