Bitcoin wallet because you can be your own bank w/o someone taking your btc.
The only disadvantage is that when the bitcoin is in your wallet, you cannot earn bitcoin interest. Just the value increase.
Exactly, both are important in their own way, you cannot neglect the fact that both are important for an individual, as banks are important when it comes to investment in other products, and bitcoin will never give you interest, So I believe bitcoin and banking system both are important.