I think yes, hodling coins is profitable. Just need to choose coins more carefully to keep them for a long time. And from time to time you still need to monitor the news and the market in order to stay abreast of the latest developments
Yes you are right with that we need to search very well the fundamentals of the coins we want to hold for a long term and that is true we need also to monitor it but not panic sell when the market was going down because those coins I've chose for long term hold, I really believe on their projects and they will be huge after few years.