I don't think anything will happen. Bitcoin has always been and will remain the first number. In order for the capitalization of any cryptocurrency to increase, huge money and coordinated actions are needed in the market of those who invest this money. But the most difficult thing is to keep the capital. It's difficult.
Yeah you are right. Now the trend is different and many people are putting their money in Altcoin because of the decreasing price of bitcoin and other reason is high price of bitcoin. Small investors are looking to Altcoin because Altcoin also possess big potential of growth and in the near future small coin investors will also earn big money due to increase in the price.