Which is better to invest in copy trading or bot
And is there any other alternatives
I have 4k btc to invest
None, both are the same because bots works base on the program it is designed to run on and these are usually from people’s opinions and it is risky.
The best alternative is to keep calm and learn the trading yourself which is less risky because you knew when to pull out and so on.
As for now without proper training trading knowledge I wound advice you just hold some bitcoin with the funds you have either by buying through the DCA method. And then you can continue to learn your trading skills
Bot has its options and feature so it depends on who is setting up the bots. The function of a bot is dependent on the input of the user so I don't think it is risky for a veteran user of bot but yes it is somehow risky for a new user due to not being familiar with the application.
Between bot and copy trading, I think it is better to learn how to setup a bot than copy trading since if we are knowledgeable enough with the market, we can then set our bot according to what we learn and possible insight of the future trading. While copying is limited to the action of the account being copied.
I would also advice @OP to familiarize himself to trading and gain enough knowledge to determine the possibilities by just reading the market price movement.