If you don't hold the keys, you don't own it.
The breakthrough of crypto technology is in cutting out middlemen, or intermediaries. Other Bitcoin IRA products give you a "view only" wallet of the assets held by an intermediary. This intermediary could get hacked and you could lose your holdings, just as has happened in every major catastrophe in crypto history.
If you want to embrace decentralization and hold your own crypto in your IRA, this is how you to do it.
Legal tax avoidance meets the fastest growing asset class.