You can confirm what I am saying by checking the market cap of the crypto market and see how money is being pumped daily into the market.
This could just be a temporary fall that would have happened now and trading at 3750$ . Though their is no need to panic as such because this things keep on happening and we might see that in coming time itself it would again rise and reach 5k as well. So be calm and hold on.
Again, we are still in the bear market, speculators will do everything to short and make money including bitcoin. So don't be surprised by this marginal fall from time to time.
Also you have to look at the trading volumes as well, its seems that after a good pump, the volumes started to slow down as well. Typical of a wait and see attitude of most crypto investors now. Not willing to risk and will just ride along with the price goes up again and then sell to take profits.