ETF margin ratio is only 30% and margin rates are <%6 on RH, so you should try to at least roll out of that other scam costing 2X

Gains tax is your biggest problem here, if you sell .15 you get a tax bill on your gains, but if you borrow you pay juice and add leverage risk

I'd say pay your expense with the leverage to avoid tax and put any new fiat into ETF first to rebuild your price exposure... Then borrow against the ETF to buy back your real coin to lower the juice and liquidation risk