No one know about that, but I guess that could be possible if litecoin is lost trust from the investors. There will be a big panic selling from the investors, and they will moves to the other potential coins.It is difficult to predict if litecoin can be out of the top 10 coins, but we know that in the crypto world,Anything can happen.Hopefully litecoin will not lose its position at the market, and litecoin can survive in long term.
It is impossible for investors to lose their trust on Litecoin because a lot of investors are now investing their funds in LTC due to it's high trading volume that traders and investors don't have any problems on where they will buy or sell it to. So it is impossible for Litecoin to be out of the top 10 altcoins in the market.