Most noobs don’t have $20k plus to play. GBTC has been a great trade even with the premium.
Dannon, Heineken, SoftBank, Tencent,Ahold, ect trade on Pink. IBKR worries traders OTC get screwed by crazy spreads or the stocks get pumped making inexperienced traders cry to IBKR. GBTC has been the only way to trade Bitcoin that’s reasonably priced.
And a $30+ stock/fund like GBTC should not be seen as a penny stock no matter where it trades. Thats archaic.