Struggling with the thought of purchasing bitcoin etfs

I want to have BTC exposure in my Roth IRA. I was going to purchase IBIT but am really struggling with accepting the fact that there is risk associated with who holds custody of the underlying bitcoin. I like the fact that it is tax advantaged but if shit hits the fan I could lose my investment. What is coinbase (the custodian) gets its assets seized from the gov in some hypothetical future scenario? There are a ton of possible points of failure. What are your thoughts on my dilemma? Curious to hear from others who have had to make this consideration