Your concept of "$SUN" depends on the context, as "SUN" can refer to more than one currency or project. I will clarify the basic possibilities:

1. SUN Coin (famous on the TRON network):

Currency Name: SUN

Network: TRON (TRC-20)

Function: A currency dedicated to supporting decentralized finance (DeFi) activities on the TRON network, such as staking, yield farming, and governance voting.

Launch: September 2020.

Currency Founder: Justin Sun (founder of TRON), which explains the name similarity (SUN - Sun).

Features:

Used in DeFi projects within the TRON ecosystem.

The SUN governance system allows users to vote on network changes.

Offers staking rewards.

Trading: Available on major platforms like Binance, KuCoin, and others.

2. Important Updates:

The currency underwent a "relaunch" or "migration" (SUN token migration), where old versions of SUN were merged into new SUN to facilitate decentralized financial activities.

Quick Additional Information:

Currency Symbol: SUN

Total Supply (Max Supply): Adjusted with updates.

Main Use: Governance, Staking, DeFi.