/biz/ - Business & Finance

Please explain, why cannabis stocks are having such a big bull ride?
Traded with 3k, went up to 5k, then thought "it is time to sell", but forgot as had to do stuff irl and afterwards saw all stocks fall by 15% and thought "well, they will get back up, eventually, i am here for long term investing". Now at about 2.7k which is quite sad having quite well executed trades prior and simply holding made it get on a hell ride.
To be honest, I have no idea how to determine long term target price, thinking "looks like it would go up, means it will most likely fall in short term, looks like it would go down, means it is likely a good buy", mostly well applied at stocks which look lowballed comparing the history.
Any recommended books on how to determine long term target price?
Any comments, advices would be highly appreciated.