They are not bad. The only bad thing is that you never know when the actual decline will start. For example, the reason for the beginning of the bearish trend and now continuation is pretty absurd to me - that news and FUD were absolute nonsense. There were much worse news over the course of three months when the market was aggressively bullish.
Timing the market is a hard thing.
That is why you need to use both fundamental and technical anaylsis so that you will have a good idea when the market is failing so ou could get out from these altcoins,doesnt make sense because the totalmarketcap can be monitored easily so you will know if the bears are going to dominate the market,cutlosses are needed when something like this will happen.
I always use both fundamental and technical analysis, but in this case, they don't help too much, not in the real classical sense.
Fundamental analysis doesn't help since, for example, currently all altcoins react to Bitcoin's trends no matter what happens in the community of each, so there is no sense in fundamentally analysing any of them to time the market (we are talking about timing the market, not about choosing the right project to invest too for which the fundamental analysis is still the killer)
On the other hand, the technical analysis is easier to be applied for long-term trading, while for the short trading it only has some sense if the market is mature. We can use it to track support and resistance, we cannot really use it to track the trading shapes (I tracked quite a few but the market never reacted according to the praxis, and there is a good reason for that), and we cannot use it to time to which FUD news the market will react.
So, it all comes down to pure behavioral science, but with the behavior of the people then doesn't really make sense. We can more easily track the trend over the year then the reaction to the news. Last year we had a rise during summer and again at the end of the year, hence I expect the same this year as well..... that is the only guessing I have.