If you look at the current market situation, it is certain that the bulls have returned as most of the altcoins have experienced very good growth. although the increase in each coin has not been maximized but I believe this positive trend will continue until every altcoin gets its ATH back.
Anyone who's not yet convinced that the bulls are back then they should start looking at the price of bitcoin. We've got a continuous increase on it. Some delays have happened but it had stayed to $50k and above it. Like how much it is right now, this is how we're telling everyone that the bulls are back when the price has increased again. And as for the altcoins, there have been a lot of those that have also a price hike for which they usually happen whenever bitcoin is also at high.