I always thought that reading crypto charts should be for traders only but I was wrong all along, knowing more about candles and other stuffs about charts can tell you when to actually sell your coins for profits and also when to buy back
Without chat, it will be difficult to know the price history of bitcoin. If the price history is not known, how can the new investors know when to buy bitcoin, it will be difficult for investors. But for investors that as already known the price history, they do not need chat in my opinion, all they need is the all-time-high, the extent of correction (which they can know throught the recent price if compared to all-time-high). With this, an investor can know the right time to invest. But this is based on long term investment. But, above all, it is good for investors to know about chats, but not much about the technical aspects that traders are using.
What I understand is that investors are only looking for profit (no target price, no time bound), they will not sell for a loss because of their belief in in-depth research that is more than just price history. They are different from traders.
You are not wrong, but some investors, especially new investors can decide to just know the price history of bitcoin and also know the market worth (marketcap) which can easily be revealed while using chart sites like Coinmarketcap. But if investors will track price using chart, it would be in a range of years and not minute, day or week used by traders.
If you are going to trade, that is, to buy and sell depending on how you predict the price is going to go, you'd better know about charts. Even if you are going to be a Bitcoin HODLer, knowing a little bit won't do harm but talking about crypto in general and chart reading is usually a recipe for disaster.
It is as easy as bitcoin all-time-high price is $69000, its price recently is at 40000, that is $29000 correction. This is indicating a good time to buy and hold it for the next 2, 3, 4 or more years. Do I need chart for that? Obviously no. It all depends, you can not expect people that follows the price of bitcoin over long period of time to use chart before they invest, all information needed can be seen as they are seeing the price of bitcoin daily or weekly.