This guide was first posted in the Romanian section: here but I decided that much more users can benefit from it so I translated it in English. 
I'm going to start by posting a glossary of terms first, it will take something to translate everything from the original post because I have a lot of work to do besides that and I'm quite lazy as a person. Here you go :
Altcoin - abbreviation from alternative coin, or all the projects that exist except Bitcoin
AML – Anti-Money Laundering.
ATH - All-Time High
Bearish - Downward Trend
BFX, Finex – BitFinex exchange-
Bullish - Upward Trend
CB – Coinbase Exchange
C&H – Cup and Handle chart pattern
Core wallet - a wallet that contains the blockchain
Circulation supply - number of coins/tokens in circulation
Dapps - decentralized application
DCA – Dollar Cost Averaging
Fiat – money without intrinsic value that is issued and regulated by a government. Example: $, £, ¥, € Fib - Fibonacci retracement
FOMO - Fear Of Missing Out.
FUD -Fear, Uncertainty & Doubt
H&S – Head and Shoulders chart pattern
Halving/halving – The reward for miners decreases. It happens 1 time every 4 years at Bitcoin.
Hoobi – Huobi Exchange
HODL / HOLD – basically long-term investing. Only used sometimes in comments: Hold On Despite Loss
ICO - Initial Coin Offering.
KYC - Know Your Customer
Long – a form of buying (you believe that the coin you bought will rise in price)
Short – a form of selling (you get the idea)
Market cap: price per coin/token X circulating supply
Max Supply – total number of coins/tokens that will ever exist
Miner - device that validates the transactions of the blockchain
Mnemonic Phrase – a secret group of words that represent a wallet
P&D – Pump and Dump
P/L, P&L, PNL – Profit and Loss
Polo – Poloniex exchange
Public key – the key which you can share when you need to receive a payment (you can share this key with anyone)
Private key – a key used to access a wallet (don't share this key)
Rekt – wrecked. Losing a trade
Satoshi – the smallest part from one ฿itcoin . 1 Satoshi = 0.00000001 ฿..
Stop – stop-loss order
TA – Technical Analysis
Whale – one entity that buys a big amount of coins/tokens.
Other sources of crypto terminology from the forum :
1 2 3 
