The Alt coin market topped ! BTC is up because people are moving out of Alts. Why because there is no new buyers. It's called a bear market. Moving into BTC is a good move. Every time you see a little green in Alts it's because either some one is trying to un load their coin on someone else or people that don't realize there's a top are buying with know one to sell to.
It's very simple if you buy and are up its because the market is moving up. If you buy and are loosing it's because the market is moving down.
I think that way, someone prefers coins that have a price that always goes up without any drastic price reduction
thanks for the analysis ,I have gain so much experiences from this forum and I can tell you that during the little price pump today I take some profit and I am going to wait to another good time to buy cheap and sell high