Because nobody knows when the market will start to rise. But, as I expected, this time not from Sales just stopped and watched the market and appreciate this time with I family on the grounds that in a few months the market will start to rise. So this time there is no compelling reason to offer. I don't know myself and I can't predict the increase. But if the coin that I hold is valid and worth holding, I better hold it or I have to cut my losses.
Much better to invest more because if you invest more you receive more money unless you know how to manage it wisely.
Only requires gradual learning to find out prices will rise or fall later. You invest in large quantities, not necessarily profitable if you do not know which coins will rise.