My apologies Alamin09! You really got me confused there.
First you indicated that promoting bitcoin is of a futile effort and ended up taking the blame on the bitcoin holder should one decided to sell it of and no longer hodl them.
But still, allow me to thread nearest to the thought i gathered from your post.
Selling bitcoin is never a stupid decision when you sell it with a good intention! if the sold amount of bitcoin serves you a purpose, then it is never in vain.
You see, we have to go back to basics, bitcoin was created to be a digital cash, a mode or means of payment. Take out digital and you end up with cash. And that's how it should be viewed. If you do a purposeful spending of your bitcoin, then it will never be stupid at all.
It would be more foolish to keep them in times of need and that is the most sincere two cents i could give from my end.
Regards.