My guess—and it's only a guess—is that some people/groups are driving the price of some of the top coins down in an attempt to accumulate. Some people, like a lot of people on this forum, believe that FCT and others have a very promising future. Some of those same people have a lot of money, and wouldn't mind taking on a short-term loss if it allows them to accumulate more of a certain crypto at a lower price—which will, eventually, be a LOT higher. To try to explain FCT's drop over the past months based on BTC's rise is ridiculous, given all the good news FCT has come out with during that same time period. AMP falling? sure. STEEM? yep. But FCT? Or looking at another coin, MAID? What's happening simply can't be accounted for given normal market dynamics. That FCT has been hit the hardest relative to its updates and prospects is, I think, a sign that some people really want to collect it. Which means that they're smart, even if they lack any pretense of decency.
The only upside to this frustrating situation is that those who are accumulating will at some point have accumulated, and if they're have as good at driving the price up as they are driving it down, FCT and a few other markets could get a little ... bit ... crazy.
Can you tell me a way how to drive the price down while accumulating on your own?
I mean you really have to get some idiots to panic sell , otherwise you wont be able to buy yourself?!?
It's tricky but basically you can sell a lot on margin in the hopes of triggering margin calls / forced sells, which you could then buy up at the lower price. The bigger game is creating an alternative reality around a coin—fud trolling a la GrossBit, Papou and others—so that people sell to you willingly. Drive the price down for long enough, and the psychological response among some investors includes "cognitive dissonance" (given FCT's string of good news) and "learned helplessness"—both of which weakens hands.
I'm not sure if everyone panic-selling or selling otherwise is an idiot. Some probable are, in fairness—it takes all kinds—but the bigger issue is that FCT is genuinely hard to understand. I mean what it does is relative simple, but how it does it, and how it protects itself technically and competitively, is actually very complicated, even among cryptos. So I don't think it takes an idiot to not get it, just someone who hasn't spent enough time researching Factom to the point where they know enough not to sell when manipulation hits.