I think to wait, because the situation is really not as clear as Bitcoin from $ 6700 and down to $ 6000 price is an unexpected movement, with no news or other speculation, in fear of going back deeper but this is not a disaster, but it is an opportunity that good to buy more altcoin best and the price is cheap enough, so to be calm in the face of the situation if there is a chance then take advantage, the market situation will not continue like this it will soon rebounce for all cryptocurrency.
For long term holding theres no need to wait,because if the fluctuating stopped and turns into growth youbwill be suffered bitterness of not buying when the dip happens
There is no right time to invest in bitcoin if you see opportunity like this, don't waste it or you will regret if the market started to pump again. Altcoins is still in a good position right now, buy a great one and be happy in the future.
I agree that the market will rebound when it finds a bottom.
Of course because investors will love that situation, but don't wait for it because we don't know how much is the bottom.
i think bitcoin is at the bottom of the floor, so we can invest in large amounts. as well as altcoin that follows the fluctuations of btc. so if btc rises then altcoin likely will rise as well