I've used small amounts here and there in the past, and afaik I still have some left in a bag of it I bought ... let me check, lol, May 2018.
Asking about its safety is an excellent thing to do, but if you haven't studied up on what can make it risky to use, I'd avoid it. If you have any tendencies or history of taking more than you originally intended to of anything, I'd avoid it. You won't miss it once you stop taking it, I didn't, so maybe avoid having to be concerned about taking it, by not taking it.

That being said, as an occasional mood boost, motivation enhancer, I found it to be OK, and I was careful to stay within the recommended amounts, and to not take it every day.
It sometimes gets referred to alongside supplements like Ashwagandha (often considered an alternative to Ginseng), Rhodiola, St. John's Wort, and SAMe (S-adenosyl-L-methionine).
Both St. John's Wort and SAMe need to be taken with an awareness of dosages, the bad side effects of taking too much, or responding adversely to them, the need to start with small amounts, and to not mix them together, but generally speaking they aren't widely known for coming with the potential risk that L-Dopa carries with it.
Rhodiola can put you way too on edge if overindulged with, but again, not known for the kind of risks that comes with L-Dopa. Ashwagandha afaik has a benign reputation, and not known for bad side effects.
But if you really want to try boosting your dopamine levels, and are concerned about safety, L-Tyrosine might offer a safer alternative, though of course you'd still need to practice moderation, and all the normal protocols for when experimenting with powerful supplements.
https://en.wikipedia.org/wiki/Tyrosine# ... d_hormones
NOW Supplements sells a powdered version that is very inexpensive per serving.
One last caveat. Ironically, the supplements that benefit you the most are the ones you need to ration the most. If you responded well to anything that affected your neurotransmitters, that can be good, but it's also a signal that your body is going to counteract that boost if you overdo it.