Lol pretty sure its illegal for a broker to purchase bitcoins off some unregulated exchange with client IRA funds.
who needs a broker to buy bitcoin on coinbase or itbit?
Pretty much anybody that wants a portion of there 401k or IRA invested in bitcoin. That's what shares like gbtc are for.
Nobody with at least reasonable knowledge of finance pays more for any assets in IRA than on non-retirement accounts.
Maximum tax is no more than 45-50% in the top bracket at most taxing US jurisdictions.
You can buy 2.77 bitcoins for the price of one "GBTC" bitcoin
50% of 2.77 BTC is 1.385 BTC, so even in a worse case of taxation, it is still 40% more profitable (MATHEMATICALLY) to buy BTC on exchange than GBTC in most favored retirement account.
I guess, it simply shows that most people don't have cash, but have IRA balances.
i don't think that bitcoin per se was ever a "tulip", but GBTC certainly is one.