That person don't know how to develop things like that. It is not easy to develop something that you wish to make. Even if bitcoin don't have airdrops or cool logo it still surpasses dollars value and also gold. This only means that person who tweeted it is one of the dumbest in cryptoworld.
Due to big holders pulling out their funds like whales and corporations, fake news, conspiracy or other things that would ruin bitcoin's reputation. Holders now rely on news may it be real or fake. There goes newbies in crypto that buys bitcoin and then dump it.
Yes crypto coins will be volatile forever as it depends on demand and supply. As will as investors, whales, traders and corporations. Coins will be less stable if the developer stops updating or upgrading a certain coin.