time to start being crypto-coin wary ?

John Oliver talks Cryptocurrencies, and his point makes sense. 

With - 

• 1500 cryptocoins
• Companies triple their value only by changing their name and adding bitcoin into it ? 
• sums of money being raised by NEW bit currencies gets to the incredible stage. ICOs - initial coin offerings - become gold mines with very little behind them...  A company raised 35 million $ in less than a minute ! (the BAT)

Yes, I agree.
Not every blockchain scheme is bullshit. 

Not every cryptocoin is a con-job.
The future might be here. 

But it seems that most revolutions get - sooner or later - to that bubble stage...
Yes, it is true - lots of money can be made by other's raging optimistic/foolishness, but lots more money is going to be lost by hard working innocent people....

Time to take care, folks...