Hi,
As I stated learning about bitcoin , I have found that there are a lot of other crypto currencies like Bitcoins. I am wondering why we have many types of crypto currency, who regulates all these currencies, are they exchange able ?
In short,
I have found that there are a lot of other crypto currencies like Bitcoins
These other coins are so-called "altcoins".
I am wondering why we have many types of crypto currency
These altcoins simply exist because there is a demand and a market for it. Most altcoins fullfill some usecase, think about things such as video sharing, hosting files, super computing, gambling coins/tokens, the list goes on and on.
who regulates all these currencies
Most of these coins have a dev team behind it, working on improving the infrastructure of the coin. They're usually the ones who "regulate"/decide what happens with the coin.
are they exchange able ?
Most of these altcoins are listed on exchanges, yes. See both
http://poloniex.com and
http://bittrex.com , not all of them are going to be on them, but alot of good ones will. See
http://coinmarketcap.com to find out where the coin is listed.