What causes this market decline?
SEC pressing centralized exchanges, as simple as that.
What do you think of your friends to take advantage of situations like this, is it now the right time to buy a few coins?
It is always the the right time to buy, but not
few coins and instead only
one coin, bitcoin. But even then, I am not suggesting any of my friends to buy anything as I learned it the hard way why its not a smart thing to do, even if you are suggesting people to invest in bitcoin.