Which are the most quality crypto company stocks?

I have been looking at $WULF,$MARA,$RIOT,$CAN,$COIN.If you have any other suggestions I am open ears.

My main question is,do any of htese stocks have an medium to long term concerns with their long term business plans,revenues or anything else I could miss?

I am looking for crypto exposure by buying these stocks,and hopefully leveraged moves on the price of BTC should the market continue upward,but I will hold long term so if the markets take a turn I would like to know they are safe from going bankrupt.

Thanks