Dot-com déjà vu

As all of you know, we are witnessing a price explosion of the different cryptocurrencies.
When we see the graphics of the total market cap of cryptocurrencies, we wonder if we are in bubble territory.
Especially in the altcoins. Lately there have been publishing many posts, in steemit and other media, stating the extremely high price levels of the cryptocurrencies.

Here some current market cap graphics (taken from coinmarketcap.com)

On the other hand we see lately so many ICOs, this reminds me the IPOs of the do-com boom in the late 90s.
Is the cryptomarket experiencing a similar phenomenon?
What do you think?

Here you can see the graphics of the Nasdaq index of that time (taken from Wikipedia). Any similarities with the current crypto market?

Here there is the graphic of the evolution of the price of the tulip bulbs during the time of the tulip mania, the mother of all market bubbles (graphic taken from Wikipedia).

Of course, nobody knows when the altcoins bubble will burst.

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(Image taken from Wikipedia)