People saw bitcoin on almost $20 000 in December 2018 and they believe that this will happen again. So now they buy for "cheap" price ($7000) and they expecting that on the ending of year bitcoin will be around $20 000 again. It's great opportunity for people who have bigger amount of money that they don't need it, but there are people that take loan for investing in bitcoin and hoping that they will earn a big profit.
This is right and explains why people keep buying bitcoins. They sill have hope for bitcoin. We know some influencers are putting bitcoin under pressure so that they can maximize their capitals with bear traps.