Selling stocks can be a good move but its also depending on how much you want to spend on the bitcoin and how much stocks you are having.
I think if you have a large amount it can be worth it but on the other hand its depending on how the market of your stocks is going.
I agree and in addition sell only your stocks that will book you a profit and you think that will not increase or will decrease in price in the future. Keeping stocks that have potential to increase in the future is still the way to go. Removing those that will possibly decrease and changing it to bitcoin is reasonable move.