Instant payment confirmation
Electroneum is a crypto-currency that was forked from Monero, it retains the same ring signature cryptography and runs the original cryptonight algo but is now ASIC based after the release of the Baikal ASIC's for cryptonight. Monero forked again and announced they would fork on a regular basis to keep ASICs off the Monero blockchain, ETN embraced the more powerful solution (better transaction speed, more hashpower). On GPUs Electroneum was a .10 cent coin, on ASICs it quickly fell to a low of .004 cents. Recently they announced an API for ETN that provides instant confirmation of funds, it appears they sandbox the funds internally to prevent a double spend. The API is a standard API that any merchant can integrate. A company has adopted the use of ETN for purchases (Blublokr Sunglasses, haven't even looked at the details but I did read they now accept payment in ETN online, whowouldathunk).
Now almost quadrupled back to .02 cents (all USD) ETN is trading very strongly, mainly on the Kucoin and Crytptopia exchanges. Hard to say if it is going to be a widely adopted API but the cryptomarkets are giving it a test flight for sure, ETN/BTC pair on Cryptopia is at 355 BTC volume for the day (2.17 million USD) and it continues to trade strongly.
Buying selling crytpo requires an crypto-exchange account that offers FIAT/CRYPTO pairs. Most exchanges offer Bitcoin, Ethereum and Litecoin pairs ie BTC/USD, LTC/USD, ETH/USD. Open an account on one of these exchanges to move fiat into the crypto-world, then transfer the purchased BTC to a crytpocurrency exchange. Be very careful, almost every Altcoin is worthless. I would suggest evaluating coins based on the USDT (Tether) pair or TUSD (True USD Dollar) pair availability rather than just BTC pair availability. Every exchange will offer a USDT or TUSD market and that will offer a limited number of pairs to altcoins. These pairs can act as parking spots generally unaffected by volatility. I like these cryptocoins - BTC, XMR, CEFS, UBQ. That is it. I have mined just about everything that can be mined. I accumulate XMR and CEFS. I mine UBQ and XMR. TUSD is a stronger version of Tether for the truly skeptical, fully backed and audited and 1=1 to the USD.