In the coming years, according to Bitcoin experts, adoption will increase.
Bitcoin adoption is always on the rise. The rate is changing and also the quality of it.
For example during the end of the bull markets when we are close to the peak the adoption is mostly lazy gamblers who think they can make a quick buck (ie. low quality adoption). During bear markets we get more people who believe in Bitcoin's principles rather than profit making (ie. high quality adoption).
He claimed that 3.7 million coins are lost, with the remaining coins being held on chains by early adopters.
Both of these statements are weak guesses since we have no way of measuring either one of these and the fact that everyone makes a guess that is wildly different from others proves these are very weak gueses!
He claimed that this specific set of people is seriously impeding the adoption of Bitcoin. As they have the ability to shock the entire system with sell/buy.
There are many different ways that bitcoin market could be affected and market manipulation is a very real challenge that we face. But it is not a specific set of people and they can't always get what they want. For example during 2017 we clearly saw many occasions where "whales" tried to go against the market (shorted bitcoin thinking it should dump) and lost millions of dollars hence failed to manipulate the market.
I believe the system should be changed such that each person is limited to holding a certain quantity of Bitcoin.
I think that this will hinder widespread adoption. What do all of you think?
You are right that this will hinder adoption (meaning it will prevent it) because people would dump such a currency that puts such a limit on how much of it they can own.