Which is better long term BTC Or IBIT?

I’m not interested in using BTC, I just plan on holding it for however long. I already have like $35 of BTC sitting in my brokerage Should I move it into my Roth IRA and just throw like $5/week in it? It’s gonna be like 2.5% of my portfolio which consists of VOO, VGT, VXUS, SMH, SCHD & AVDV I don’t really believe in CC but I mean with all the hype around it and all the big investors throwing something at it has to mean something.