Hi guys, I have alts but need BTC to make some bets this weekend.

I can liquidate my alts for BTC but last time I did that, BSV went up like 8% and I ended up getting screwed because the betting site took hours to release my funds, so I was wondering if I can just borrow BTC instead of risk liquidating my alts and potentially losing out because of a market move.

Need $4-5k in BTC. Is this even possible? Realistic? Thanks.