Biotech is HIGH RISK. It's like GROW in the sense that it can do wild swings in short timeframes.
You can win big you can lose big.
However, one advantage is that the sector has been relatively beaten down. If you take the gamble when the prices are low, it does not have far to fall if it falls, but there's a whole lot of upspace.
Biotech is one area of the market that you are paying for the promise, not the bottom line, so it's not the sector for the inexperienced... you have to at least have some idea of what is promising vs what is bs. That's why news of FDA anything makes one of these stocks go to the moon.
With Biotech you generally don't want to hold for the long term... look up some of the historical charts for any of them... they go UP UP UP then they go DOWN DOWN DOWN based on any rumor.
So how do you find out which are worth buying? Since the moves when they happen happen lightning fast?
You try to read up on the most promising, or choose the ones that will likely not be able to fall farther... but STILL HAS SOMETHING in the pipes that is real. Then you get in before it's due to announce based on prior announcements. Ie., 'blah blah will submit to the FDA in 2 months', so you put it on your calendar to buy in 6-7 weeks.
Nothing is free, you have to do a lot of research, but if you do the research and find the hidden nuggets, the payoffs can be enormous. Biotech news is conveniently all out there... science journals, publications, etc. It may not show up on STOCK news, but what is coming down the pipeline is definitely public info you can extrapolate.
Because it's such a downtrodden sector, it's a nice one right now, as you can see by the ones I have.