People will tell you "nothing has changed" so buy now! "Cryptocoins exact value is very difficult to pinpoint, it's just volatility", they will say...
Last 24h of ETH
Of course things have changed. Just because the crypto markets don't have major news it doesn't mean that the investment world doesn't have important news! Thinking that nothing had changed based on reddit.com/r/CryptoCurrency alone is the perfect example of living in a bubble (the crypto-bubble, that is).
Actually, most coins except perhaps for BTC, DASH, LTC, and ETH have a value which is very easy to define: 0. They're based on little more than promises!
My hypothesis is that there are some big corporate players in the space manipulating the prices and taking advantage of all the hype, deciding secretly when to sell thus transferring wealth from all us n00bs into their already overfilling pockets.
Whatever it is, get out of crypto while you can or prepare to hold for years (again, BTC and a few others with actual proven value).
This is an amateur opinion. I'm not a professional investor. This isn't investment advice.