Contrary to this trust would be the immense volatility we see in crypto markets, especially in bitcoin, ethereum, and litecoin.

Bitcoin is more of a store of value as are Litecoin, Bitcoin Cash and Monero. 

Purchase price: $50 Cash invested: $50 Invested in Crypto assets: Bitcoin ($20), Eath ($10), Bitcoin Cash ($10), Litecoin ($10).

I plan on buying into Litecoin and a few other very small crypto.

There is a lot of controversy on Bitcoin, Ethereum, Litecoin and other similar cryptocurrencies.

which exchange is everyone using to buy/sell bitcoin, litecoin, all cryptos? 

They are in the media telling everyone it could go up 1000% more, which is their attempt to build hype and increase the value as they plan their exit.The founder of Litecoin just cashed out after a 9300% run up in value.

There are other cryptos like ETH and Litecoin that are becoming really popular.Blockchain is definitely the technology of the future and will affect almost all aspects of finances, accounting and life.Banking: making it easier to do money transfers and wires - at low costs. 

What the heck is a bitcoin/litecoin/Dogcoin/Dr.DreCoin, etc??

I like to describe the division of crypto currencies between those for store of wealth/exchange of value (Bitcoin, Litecoin, Bitcoin Cash, USDC, Terra SDR) and those that are more like software companies (Ethereum, Algorand, Tezos, EOS, Polka Dot) which are similar to phone company networks.