What is it about the last 7 days in the crypto world? Mainstream?

Why have alt coins exploded specifically in the last 7 days? (And the last month as well).

Is it just because alt coins have gone more mainstream, and now newbs are getting into it?

My theory is the Ripple effect – once Ripple, the famous bank-connected coin which had been sitting at a penny for a while, then at .25 for a while, then at .75 for a while, then exploded into the $3s…. people started getting ideas and aggressively putting money into other penny coins… I think that's what's…

What is it about the last 7 days in the crypto world? Mainstream?