Ehh... 90% of traders lose money for a reason. Most look at things from a linear perspective. Just because BTC HAS been doing good this past month doesn't mean it'll continue to do so, and just because AMPs has been falling doesn't mean it'll continue to do so. Most traders, as you say, buy when something has already been doing good, and sell when something has already dumped... Just because most traders do this doesn't make it rational. Again, the majority of traders lose money, something which is determined by irrational actions led by emotion. Oh AMPs been dumping for days?! I THINK I'LL SELL!! What, BTC is double what it was a year ago? Best time to buy! Nope... Buy low, sell high, look at things from a non-linear perspective. No one can read the future, that's why valuation and knowing what something is truly worth if successful is so important.