Onion currency is a Coin, so it has a dedicated blockchain. In terms of blockchain, its security is the most important advantage that the privacy of DeepOnion network transactions is well protected. Onion, like other coins, can be mined and uses a combined PoW and PoS algorithm that has great power.
Payments made through the DeepOnion network are through random wallets, which make tracking almost impossible.
The Onion currency was introduced in 2017 and reached a high price in early 2018, but since then its trend has been downward (although after a relatively large fall, the price has stabilized relatively)