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.

Ya sell shares to the public to start the show

Thats how ya - lower cost of capital attractive

To small companies with a client base that's active