BTC Roth IRA?

Hi All,

I'm looking to open a ROTH IRA account to hold some BTC. I currently have some BTC in a hot wallet; does anyone know of a way that this can be transferred/rolled over to a Roth IRA without triggering a taxable event? Secondly, does anyone have any recommendations on good custodians/brokerages for a BTC Roth IRA? I'm ideally looking for an account with low fees (relative to the crypto IRA world) & the ability to hold my keys would be a plus. Thanks!