Will bitcoin have a massive crash soon?

Bitcoin has under the latest weeks gained a big increase and has currently one of the best distribution of all time! But isn't it under these circumstances that most assets have their biggest crash? We can start from the beginning what will it mean for the whole cryptocurrency market if bitcoin has a massive crash? I think it will have a short-term effect on the market will be pretty bad if Bitcoin loses a lot of its value. Cryptocurrencies like ETH and XRP (who loosed a lot its value recently) will not die but they will land downhill that without any talk will harm them long term. In my belief, this is the perfect time to sell bitcoin is this the best time to sell most of your top 10 assets to later buy them back when the cryptocurrency market is more bullish. 
What do you think?