In order to buy BIT20/TWENTIX, you need an account on the BitShares decentralized Exchange. Just like in Europe where all your purchases have to be done with euros, on the BitShares ecosystem, you need BTS (bitshares) to operate. It's the currency of the platform.
You will find all the explanations you need below on how to create an account on BitShares but also how to send BTS to your account, change Bitcoin to BTS directly from the wallet and how to proceed if you don't have Bitcoin in the first place.
There is a lot of options available on the Internet to buy bitcoins.
On of the most popular and reliable is Coinbase. The process to buy on their website is very clear and easy. You still can watch one of the several tutorials videos available on youtube if you are more comfortable with visual information.
PROMOTION : At the moment, buying at least 100$ of bitcoins using this link, Coinbase, rewards you with 10$ more worth of bitcoins !!!
Another practical exchange is Coinimal. In this one, you can buy your bitcoins instantaneously with some of the methods provided. You can use traditional online bank transfer but also Visa, MasterCard, Paypal, Neteller, Skrill, Giro pay, EPS and Ok Pay.
This tutorial will explain how to create an account in BitShares. The whole process will take one single minute
You will create an account on the BitShares blockchain, then you will be able to use the BitShares wallet and your account to buy Bit20/TWENTIX.
This video explains in detail how to create an account. Go at www.openledger.info and follow the tutorial video (1 min 20)
There is a lot of options available on the Internet to change cryptocurrency. In this video, you will see one easy way to do that without having to go in an exchange.
This method is simple and easy if you want to trade a few BTC to BTS. If you plan on changing a big quantity of BTC, it could be better to use an exchange like Binance where there is enough liquidity for your trade.