Is it wise to have brokarage account to invest?

I have 401k and a roth ira

But I have brokerage account (Robinhood) that I have some etf and stock for growth also(40s starting late for self investing)...

Giving brokerage is taxable ..is it wise to keep buying etf/stocks shares or move all this stuff to my roth? I'm not planning to take any money anytime(unless emergency) but mainly just to keep growing it.