Should sell away my crypto at a more than 50% lost or just heck care n leave it n focus on stock investment.

Depends if you can tahan losing the 50% left. I can. so i am keeping

Depends on whether you think crypto will be here to stay and rise in future.

By right shouldnt need to bother, it should be already counted as all lost when you invested

If you need the money for urgent matter then sell away. If u dun need, and has lower conviction of crypto, sell 50% and keep 50% in case crpto rally and u still have some and feels better. If crypto drop to zero at least u lose only 50% of it.