What we have seen during the last hours, when Bitcoin has touched $40,000 is what is known as "the jump of the dead cat", it is not a bull run, it is an attempt to break down barriers. It now holds above $37,000, if it holds long enough without falling below that value, possibly if it breaks the $40,000 resistance smoothly and continues to rise, but right now it looks like it will be difficult for Bitcoin to stay at the current price.