just invest if you like the tech, otherwise keep your hands away.
fire can burn you regardless of the chart behavior we've seen in the past.

i do not think that the entire cryptomarket is a bubble but atm the market behave like one. the bubble can burst like hundred times and recover every time to new highs until the day it is over completely.
I think we will see similar things to happen like in the dot.com bubble. A few cryptos will stay and will go up even further in price but sometime in the future and I don't know when a whole lot of the shit out there will go away like instantly. Just look at things like verge, completely useless don't functioning coin with a billion marketcap... the market is just ridiculous.