I somehow agree with your statement but we should always pick top10-20 coins from coinmarketcap. Holding Bitcoin, Ethereum, Neo, Dash and Litecoin can be worth off in long-term. Like as you I also hold some coins that was really at good price 2-3 months back but now it has been reversed if I sold that time so now I can buy more at less price. But we can not predict perfectly. Always hold the trust worthy coins.
Exactly. Holding is bullshit for the shitcoins, since it's unpredictable if they'll go to 0 value, but with top coins like the ones mentioned it's always a viable strategy. All of these coins have recovered from their crashes to new ATHs.