Who is Satoshi Nakamoto?
On October 31, 2008, an author using the pseudonym Satoshi Nakamoto published the Bitcoin white paper, “Bitcoin: A Peer-to-Peer Electronic Cash System.”
Satoshi Nakamoto’s design combined proof of work, blocks linked in sequence, and block rewards, allowing mutually distrustful nodes to reach consensus on a shared ledger.
$BTC is the currency in the system created by Satoshi Nakamoto.
Invest according to what you can afford, and leave yourself some room.