This is not the perfect time to sell everything, as price is not too high at a moment and even if it goes higher I will never prefer to sell all my coins, I will surely hold some of them for future.
The bitcoin price at $575 is quite low. That is due to the investor's interest in Monero. When the mania dies down, the bitcoin price will rise.
Yes people are diverting their investments towards altcoins and that is the reason we are not seeing any growth in price of bitcoin, so to see higher price I think we need to wait longer.