Polkadot is a very solid project, which might be undervalued right now if you ask me. I've been trading it and also considering to go long term on it. I tried doing an arbitrage hours ago with DOT from binance to Kucoin but withdrawal was disabled on Binance, I think they already spotted the price gap between the two exchanges. I'll still check DOT chart to take position later on. I doubt if there is any altcoin out there which is Ethereum's big contender, so many have been hyped to beat ETH, but fade after the hype.