You bet on the bitcoin price and hope to make big profit from it. Generally speaking, many cryptocurrency exchanges today have sub-par interfaces think webpages circa So now you need to wait for the intimation or status to change from unverified to verified to buy and sell bitcoin. If you plan on buying a large amount, does the exchange support this much in exchange? They could turn out to be the key drivers behind the broader adoption of cryptocurrencies because of the independence, anonymity, and security that they bring to the table. As with most exchanges in the cryptocurrency space, especially those that trade solely crypto assets and do not interact with USD and thus do not fall under the same regulatory oversight have their risks. Hardware wallets cost money but if you are serious about secure storage of your coins they are simply a must have.