I am now sure that investment to bitcoin and different ICO with more trust factor we can gain thousands of dollars each week or month depending on how perfect you handle the whole thing. So yeah we must hold the coins that we invest in, as they are going to grow at some point for sure. :-)
I do sincerely hope that the ICOs you advise are not with companies registered in China? Of course you know about the stringent Chinese regulations and ban hitting so many exchanges now with investors losing money. I am affected too.
Its like that I trade etherium when the price is 0.14 then its going down and down into 0.7, 2 months that I hold never going up, I should cut my loses. Well you should never hold altcoins for long trade only for short trade.
Your mistake was not to hold altcoins your mistake was to buy at an all time high, if you instead avoided buying at that time and bought today you will have great chances of profiting in the next months, but if you decide to hold I think you are going to need to wait a few years before we see a price as high as the one we saw a few months ago for ETH.No one knows for certain that after a coin hits ATH that it won't break the resistance and soar more. So, the advice of don't buy high is merely a suggestion. We only get to know that we actually bought it sold when we shouldn't from hindsight after the lagging indicators would've drawn up setups after the trades.
