whats my seniors advise for me, can i sell my tokens or wait. because already am in loss.
You really lost if you sold your Bitcoin or crypto at a lower value, but if you haven't sold it even though the value of the coin you hold has greatly decreased, you can't say you lost because its price will rise again in the market, there are still high chances that you will recover your capital or even make a profit in the end that you did not expect.
it's just a term when the market is falling and the market is rising as a whole. so if you see bitcoin and all altcoins experiencing a drastic increase, then it's a bull run and if the opposite happens then it's a bear market. but if the increase or decrease is only 1 coin or token, then it will not have a big effect on the crypto market at large.
It's really hard to know or say when the bear market will end and when the bull run will return, that's why what others did is doing day trading here in cryptocurrency so that at least they can make a profit, but of course, there must be enough knowledge of things similar to this type of activity in crypto trading.