from the list of altcoin in the link you provided, then I am only interested to investing in DASH and Monero, because I think DASH and Monero have great potential for the price to increase very high in the future, so that makes DASH and Monero very suitable to be used as a long-term investment, so I will also add DASH and Monero in my portfolio to be used as long-term investment, because I believe DASH and Monero can give me a big profit in the future.