I think that investing in bitcoin in the long term is a very reasonable solution and buy it at a price of $ 6000 is a good solution for any investor but I advise you to buy it in parts !
No matter you buy in parts or at one time, the key here is to hold for long term or even if you cant hold for long term, atleast do not sell it in a loss. and using stoploss can also help.
The current price is 6687 US dollar which came at this position after a sudden increase in price and now people are selling in order to get small profit but it is totally out of mind why they are missing the opportunity to wait for it and get huge profit would be better if they do like this. It is a long term investment and it needs us to treat it as long term making short term will keep the situations continue.