Those who persist in such misconceptions lose most of the time. It should be sold if it is 15-20 percent more than your invested amount. I have seen many people who got double their invested money and held on to it and in turn lost a lot of money. One should never be greedy in cryptocurrency. Despite of having profit, greed also leads to loss of money which is very painful.
It’s not good to focus on many project since some have already proven to go away after they succeeded. There are plenty of ICO projects in the past that been successful but end up to be a scam or have issues whenever the market is in bear and not able to recover. It’s better to invest in BTC and some top altcoin than to waste time in projects that didn’t guarantee to last longer. So whenever there is a hype in a new project and experience already some profit better get it while we can and don’t be trap in that coin. Sell as long as we can get profit then just buy back once it recovers.
investing in bitcoin for the long term as well as the short term is equally profitable. buy BTC for the short term sell when it doubles and buy again at a low price. and buying BTC for the long term regardless of the doubling in price will not sell unless they reach their desired target. i call it not greedy but it really is a way of long term investment.
and talking about greed leading to money loss, to me that would never happen for a long term investment in bitcoin. look at the bitcoin price journey from the past to the present it has never betrayed its investors unlike other coins which are just hit and run