Many people asking why there are a lot of altcoins, and they suggest limits the altcoin making should be done.
The reasons why I don't agree to limits the altcoin aside from the reason of decentralization.
Here are the few;
1. The monopoly of market will be avoided.
2. There is a competition of prices in the market that can limit the price of the stellar cryptocurrency to overshoot.
3. Altcoins can cause unpredictable fluctuation of prices in the market. Fluctuation of prices result revenue for the traders/investors.
4. New and small investors/traders will be given a chance to trade in the market.
5. There is a healthy circulation of money in the market because hoarding/holding will be prevented.
6. Exchange site/market can gain also a suitable amount.
7. Bounty campaign will be continued to progress.
I agree with these reasons specially to the number 7.

... But if you ask me, I also want to limit the altcoins population in some manner or reasons.
Here are some of the reasons why I agree to limit the altcoins.
1. Many altcoins are having the same functionalities/features
2. Some of the altcoins are SCAM
3. Many altcoins today are abandoned by the developer
4. Some of the new altcoins are very expensive (for me as a small time investor)
5. Some of the exchange site don't allow small time altcoins to be trade
6. My computer harddrive are now full because of so many local wallet of my altcoins collection
