Yes that is true and that is because of bitcoin is the biggest currency in crypto world. You know bitcoin's dominance now 45 55 percentage range. and that is huge. Because of that it is normal . Bitcoin show the general market situation easily. We can see that. If bitcoin will start pumping other coins will start also. By the way you know pumping bitcoin is hard. Whales need huge money to pump bitcoin. and we can understand from here if they are pumping bitcoin it means money entering to crypto.