If it's because you think it's embarresing to sit with your bank man/lady when you need a loan or something and they dig into what you spend your money on, you can always use crypto as stated here, or get "anonymous" credit cards online, I have used a service like this, because I can for example not use my card on Lovense gift shop due to the country I'm from I believe it is.. so I have an American Master Card online.. and all my bank statements when I use this card, on my real bank just states I spend it on that specific website for the card.