For those who are interested in lump sum investments, it can be difficult to hold Bitcoin for the long term. They may sell Bitcoin for a small profit,
This is not true, it's just something that you are making up on your own. There are investors who accumulated their bitcoin through lump sum and they are successful long term holders. Those that sell their bitcoin for small profits are people with trading mindset and those who trading is in their blood. Holding bitcoin for long is all about your mentality and preferences, not necessarily because of the methods of accumulation that were employed during the accumulation process.
but those who plan for the long term by doing DCA can be a strong holder.
Being a strong holder of bitcoin is not as a result of the the accumulation method you decide to use. There has been instances where people who accumulated through DCA strategy weren't able to hold their bitcoin for long. So don't be deceived thinking that anyone who accumulates bitcoin through DCA can be a strong holder. No that's not usually the case. What makes someone one a strong holder is the conviction that bitcoin will do better in the future more than it is currently. You being able to see a future in bitcoin beyond what other people are seeing. Your ability to understand that bitcoin is expected to do more of an upward trends in the future, because of it's limited supply, and the prospect of more investors adopting it. These are what makes a strong holder and not the accumulation method utilized.