Maybe, maybe not, but it's a year for scammer to grow definitely, and the biggest loss for whom entering this market from now on (at least 1-2 years) is they wont make more money than people who invested in crypto Last year, 2017 was a big hit! But now is the right time to take a step in this world, just like 2017!

Forever is a 100% sure term to say, and there's not thing that get up to 100% possibility nowaday, and bct is not an exception, but it sure will take the lead quite a long time.

Can I change my application form for Signature bounty? what's if I'm newbie then become jr member in 30 days and I registered as newbie?

IMO, one reason is because of money flowing from btc to alts, this market is still a young and small one, and small enough to be manipulated by Organizations, whales, even sharks,... And another reasons is because of exchange rate differences.
But not all the time it happens like you mentioned, There're times BCT down, and almost all the ALTs are down too, that's still because of the 1st reason i just gave you, all the money are being pulling out of the markets! There're lots of causes to consider, but I think these 2 are the biggest ones, especially the 1st one.