Ethereuma global, open-source platform for decentralized applicationsWebsite:
https://ethereum.org/Whitepaper:
https://ethereum.org/en/whitepaper/Explorer #1:
https://etherscan.io/Explorer #2:
https://ethplorer.io/Explorer #3:
https://blockchair.com/ethereumWallets:
https://metamask.io/ (Browser + mobile - supports all ERC-20 tokens)
https://www.exodus.io/ (supports desktop + mobile)
https://www.coinomi.com/ (supports desktop + mobile)
https://atomicwallet.io/ (supports desktop + mobile)
https://trustwallet.com/ (mobile only)
https://wallet.coinbase.com/ (mobile only)
https://www.myetherwallet.com/ (mobile only)
Hardware wallets:
https://www.ledger.com/https://trezor.io/Subreddit:
https://www.reddit.com/r/ethereum/Twitter:
https://twitter.com/ethereumTwitter of founder:
https://twitter.com/VitalikButerinSource code:
https://github.com/ethereumSites to track price and market cap:
https://www.coingecko.com/https://coinmarketcap.com/Exchanges to purchase Ethereum (ETH) with fiat (USD/Euro etc):
Coinbase
Kraken
Binance
Gemini
Bitfinex
CEX
Bitstamp
Coin is mineable + PoS (Proof of stake) - moving into a full PoS coin.
Max supply ∞
Main difference between ETH and BTC is ETH is used to build decentralized applications (dApps) on. For instane, decentralized finance (defi) products like maker, aave, compound, uniswap and many many more.
There's plenty of coins, in fact most coins are build on top of ETH using their ecosystem for transactions. In order to make transactions with various other coins (ERC-20 tokens as they're called) you need to own some ETH to pay the fee's (gas);
https://ethgasstation.info/Some interesting products that was born from ETH is the infamous 'stablecoins' that are 'pegged to the USD' 1:1 (i.e USDT, USDC, Dai and a few more). There's even a coin pegged to Gold; Tether Gold (XAUT)
Games, exchanges, marketplaces, digital art (like NFT's), gambling, social networks and pretty much anything can be 'tokenized' or built with Ethereum.
Plenty of more exchanges, wallets and various things related to Ethereum. DYOR before taking risks and remember NOT YOUR KEYS NOT YOUR ETHEREUM. Do not keep large funds on exchanges and be careful for scammers everywhere!