Should I sell or buy Altcoins (criptocurrencies)

After a rebound in the last two days, the principal 50 criptocurrencies Continued their sharp decline.
All have recorded losses in the last 24 hours. From top ten Ethereum Classic Has registered the biggest setback in the last 24 hours, with a decline of -5.95%. IOTA (MIOTA) Is the one that has accumulated the largest losses in the last 7 days with a total of -42.49%. It was followed very closely by NEM (XEM) With an accumulated recoil in 7 days of -27.06% and Ethereum thatWhich regressed -22.46% In the same period.

So what do we do?, buy or sell? I've definitely learned from one of the greatest investors now a day, Mr. Warren Buffett, who advises anyone who wants to be a successful investor: "Sell when everyone buys and buys when everyone sells."

Undoubtedly we are before what I call psychological terror of profit-taking, which happens when the big investors decide to reap the fruits of their investment. Such is their ability to move markets due to the size of their investments that causes panic among the small investors who entered the market in the highest part of this. Creating a domino effect that is collapsing the different assets as the smaller investors start liquidating their positions seeking to protect their investments from the false crisis.

My recommendation is that you never invest money that you need in the immediate. Plan your entries in the setbacks that always affect any financial asset, Preferably opening your trades in 50% or 61% of Fibonacci retracements.

At this time the market for crypto-currencies are presenting great opportunities to enter into it.