Bitcoin at a low price obviously the best time for buying. But is it the low price? No one can ensure you what gonna happen in crypto in the next morning. If you feel this is a good time, then buy now. Don't make a quick decision about investment and forget about quick profit at this current situation. If you feel you can hold Bitcoin for a long time, whatever happens, you don't care, then buy now. Soon or later, you will get a good output.
Yeah, the situation right now is totally unpredictable as we can't predict how much low it would get. However, I think 7k$ could be a barrier that could stop it from declining even further. But still, the future is quite uncertain so I must recommend you to take each and every step wisely as only then you'll be able to get a good amount of profit...