Thanks for sharing your point of view! I think both Bitcoin and Ethereum are good to hold on for the long term, but I would not recommend you to buy more of them right no for the reasons you are pointing out in this post. But if you already have them on your portfolio, I defently would not sell them, just HODL on! Besides this coins, I think Waves has a bright future to, because like ethereum you could make your own coins on this blockchain and the popular mobile go token has an waves version to. By the way, litecoin is my favourite coin out there, the so called silver next to Bitcoins gold!