Help need ideas for legit purchases

I occasionally purchase bitcoin but it's on my bank statement as money I've sent to coinbase. I don't use the bitcoin for investing I use it to purchase items online..

I'm currently applying for credit, they have noticed the transactions and are questioning them saying it could be "detrimental" to my application.

I have told them I don't use the coins for investing it's for purchases, but I can't tell them what I really buy (weed vapes) as this won't be a good idea.

I need ideas for something legitimate that I'm using them for but that is also quite niche and would explain why I'm not using standard currency.

Any ideas would be greatly appreciated