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.