You don't need a bitcoin bank. To be honest, if you use a cold wallet or a trezor/Ledger wallet, it will be as safe as a bank.
Invest in bitmixer.io if you have the funds
This is probably the best advice.
Most people miss it too, since on their homepage its overlooked. They are always looking for investors.. so yeah better that then a new site.
But know their starting minimum is 100 btc.