Was great and May still hasn't finished. But there is danger and when remembering the previous bull run and how it ended, it was with a massive sell off and some news coming from Japan about MtGox and that trustee that was ready to dump 100k BTC. Of course this was probably a second reason, with the first one being hodlers offloading their Bitcoins and making millions after holding for three to five years.
Now, it is not going to be different either, it is Bitcoin reaching to a 40% dominance which is a critical level and altcoins rising way too much in all 2021. I expect a huge crash very soon, maybe by this or the next month and a change of the trend.