I am so curious that if Eth price overcome Btc's, what will happen in crypto world?
Well, nothing special will happen. It's normal trend here in world of crypto currencies to overcome one another in a mean time. The value of crypto depends upon the number of active users. Today bitcoin has alot of uncountable active members and thus it's value is much higher. If in near future user switch to ethereum then obviously ethereum value till touch the peak of success. But in current scenario it's quite difficult for ethereum because day by day bitcoin users are growing and thus it's market value is rising as well.