Bitcoins is the oldest cryptocurrency and one of the highest valued currency's in the world.
Bitcoin was the first-ever cryptocurrency so yeah indeed the oldest one and also the highest rated, most robust crypto even after thousands of other coins have been made.
Has a large price volatility making it too unpredictable to be used as a currency.
That has always been a problem but is somewhat solved with the introduction of stable coins because if you are worried about the price dropping you can convert them to USDT at any point.
Doing analysis to trade in a trading cause this digital currency is not consistently in a high value. Sometimes may fail to trade cause their's a sudden down of an a price, but it is a good luck when the price value is high. Being trader we must smart and confidence to trade without any doubt.
You can sometime analyze and predict the movement of bitcoin but you will never be sure because there was no single person here who would have predicted bitcoin falling at low as 30k recently. I would say rather than trading, just hold if you see the price dropping while if it's rising cash some profits to later invest once it drops again.