This is common and was expected due to the Bitcoin Halving. Some were also expecting that price to be maintained until the end of the year. Some (most daily traders and newbie investors) find it a disadvantage as it will not increased more than it's ceiling price (which is approx $10,000+) at the end of the year or even up to years to pass, hence forcing them to hold and invest in the long run (not unless he's a professional trader). Overall, the 78% increase isn't really that drastic enough to reach it's highest price on all time ($20,000+).
the halving related rise wasn't just expectations though, it was analysis and previous behavior.
most importantly it was a correct speculation. price did have a major rise before the halving but the problem was that right before that rise it had a major drop so most of that rise was actually the recovery from that drop. in other words if there were no corona-virus market crash or if it had come at least 2 months later then bitcoin price would have been a lot higher by now and stuck below $20k resistance instead of here.
there is also another phase to halving rise which always comes after the halving meaning now that a couple of months has passed. we should slowly start seeing the effects of $8-$9 million less bitcoin being sold on daily basis (that is $250 million in a month).