Confirmed the idea of people buying BTC and other coins to protect their capital.
This pump will not last longer. The reason is simple. This is just an idea, but there you go. People have bought BTC and other coins to get out of Tether (USDT), the price of BTC and other coins increases, then. They will have sent their BTC to an exchange that accepts Fiat in order to sell their BTC for real money, since Fiat is the only currency able to keep the real value. So, it means BTC has to go down. Why do I think they will sell their BTC? Simple. Because they don't want to hold them, since it's dangerous at the moment and they are not confortable holding a coin that loses value everyday! That's why they were holding Tether, because Tether's value was always 1 dollar, so it was like holding real money (just in case you don't know what Tether is).
Some people have sold already (the price has gone down), but there are still people waiting for their BTC to be deposited to the exchange that accepts Fiat in order to sell it.
My question is: What if BTC went down because some people holding bags or trading pushed it down? The answer is simple. Whenever they can sell their BTC, it will go further down and the drop will be HUGE!
This is just an idea, but it's serious and plausible.