Because altcoin world is too large comparing to single currency on top BITCOIN, how can you speculate a thousand currencies when bitcoin is just there always to show what is the movement in front of us.
and besides why need to expect in altcoins when there is bitcoin that safer and worth trusting .
Bitcoin is indeed the safest in crypto but we are here to make profits, so diversify your portfolio. The bigger the altcoins world, the bigger our chances of making a profit. There have been many successful altcoins not just bitcoin.
This market is made up of not only bitcoin but also altcoins. New trends constantly creating in the market are the main reason driving the development of the entire cryptocurrency market.