According to my point of view The  first online cryptocurrency exchange based on block chain technology has been started in Belarus the world's first  regulated  tokenized securities exchange,, financially supported by London-based Belarusian entreprenuer a Russian business man .The online service allowed users to exchange different types of cryptocurrencies and also to sell and buy for national currencies .Block chain technology makes online transactions faster and more secure and as well as anonymous .Token may be used to safe guard sensitive data such as bank accounts  or financial  statements  the decree makes initial coin offerings and transactions in crypto currencies legal and all such trades will not be taxed.till the year 2023 .

The first online cryptocurrency exchange -- based on blockchain technology -- has been launched in Belarus.

Media reports in Belarus said on January 15 that what they called the "world's first regulated tokenized securities exchange" at Currency.com was financially supported by London-based Belarusian entrepreneur Viktar Prakapenya and Russian businessman Said Gutseriyev.

The online service would allow users to exchange different types of cryptocurrencies as well to sell and buy them for national currencies.
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Blockchain technology makes online transactions faster and more secure as well as anonymous.