A stock is a share of ownership in a company - in other words, it's a kind of regulated security that represents fractional ownership in some public or privately traded institution.
An option is the right - but not necessarily the obligation - to buy or sell shares of a certain security at a certain pre-decided price on a certain pre-decided date. Options lever you up - often traded in segments of 100 shares.
An ETF is a 'grouped' or pooled investment - like a stock, its treated as a security and traded on stock exchanges but is much more flexible. ETFs can be set to track anything - from the price of silver to 500 stocks.
Cryptocurrency is a digital (or 'virtual') decentralized currency that uses blockchain technology to verify transactions; as a result, many proponents argue it is more secure and less reliant on governing institutions.
We appreciate your interest in The Terminal. Other areas of The Terminal are currently in private alpha testing. We will soon be opening up The Terminal beta to members of our waitlist.