When issuing a transaction in IOTA, you validate 2 previous transactions. This means you no longer outsource validation to miners which requires wasteful amounts of computing power and usually a large stake of coins. These required resources are, in effect, centralizing the currencies which many believe were created to be decentralized in the first place.  

As a cryptocurrency attracts more interest, mining becomes harder and the amount of coins received as a reward decreases. For example, when Bitcoin was first created, the reward for successful mining was 50 BTC. Now, the reward stands at 12.5 Bitcoins. This happened because the Bitcoin network is designed so that there can only be a total of 21 mln coins in circulation.
A cryptocurrency wallet is a digital place for your coins to be stored. Each coin has a certain wallet provider. That could be official GUI-wallets, web wallets and other applications. The wallet address represents a randomly generated combination of digits and letters. CoinSwitch doesn’t provide wallet addresses and never stores user deposits. To exchange cryptocurrencies, you need to have a cryptocurrency wallet address.
Advice from 2015: As a rule of thumb, don’t acquire any volatile assets you can’t afford to lose. This is a valuable guideline for investments in general. It’s important to look at the history of the value of Bitcoin. In late 2013 and early 2014, Bitcoin gained considerable Media attention, and the price of all coins inflated wildly and unreasonably. Since then most coins have leveled out at about double their pre-2014 value, but there is still plenty of room for the price to go down. History has shown us that there is plenty of room to go up as well. $1,000 Bitcoins? It happened once; it could happen again.
The legal status of cryptocurrencies varies substantially from country to country and is still undefined or changing in many of them. While some countries have explicitly allowed their use and trade,[51] others have banned or restricted it. According to the Library of Congress, an "absolute ban" on trading or using cryptocurrencies applies in eight countries: Algeria, Bolivia, Egypt, Iraq, Morocco, Nepal, Pakistan, and the United Arab Emirates. An "implicit ban" applies in another 15 countries, which include Bahrain, Bangladesh, China, Colombia, the Dominican Republic, Indonesia, Iran, Kuwait, Lesotho, Lithuania, Macau, Oman, Qatar, Saudi Arabia and Taiwan.[52] In the United States and Canada, state and provincial securities regulators, coordinated through the North American Securities Administrators Association, are investigating "bitcoin scams" and ICOs in 40 jurisdictions.[53]
In 1983, the American cryptographer David Chaum conceived an anonymous cryptographic electronic money called ecash.[7][8] Later, in 1995, he implemented it through Digicash,[9] an early form of cryptographic electronic payments which required user software in order to withdraw notes from a bank and designate specific encrypted keys before it can be sent to a recipient. This allowed the digital currency to be untraceable by the issuing bank, the government, or any third party.