No is not bullshit, holding means we use our chance to sell our coin that we have so int the future we can sell it at higher price, and we can get benefit from it, thats the challange in crypto world because of the value fluctuation. So in holding we need to aware and patient to the price of coin
Yes, long-term investments are usually profitable.
But if the price isn't moving during some years isn't it better to admit your mistake in coins' choice, to sell those coins and try others?