What exactly is “Proof of History” recording?
First, what it is: Solana currently uses Proof of Stake to select validators to produce blocks, and combines it with Proof of History (PoH) to order transactions by time.
How it works: Solana transactions must specify in advance which accounts they will read from and write to. Transactions that don't conflict can be executed in parallel—one of the key reasons for Solana's high throughput.
$SOL is Solana's native token, used to pay fees and participate in staking.
Every reward comes with corresponding risks, so first consider how much you could lose in the worst case.