Thank you all.
Stable 3% per day seem too good to be truth (that would make 1,000$ in 48,482,724$ just for an year

)
What about the skills required to manage the bot?
Do I need to have specific experience or technical abilities?
You're wise to be skeptical; anything that sounds too good to be true normally is. I've only been using Gunbot for 12-days now so I'm giving you a very small sample of the profits. I haven't set it loose on all my portfolio yet to minimize the risk, but what it has been trading has been solid. I made about 11% profit in a week for what it's worth.
But here's the deal... my bot traded traded like mad yesterday but has stalled now because everything traded away from BTC since BTC spiked yesterday. So I've only had 4-trades today compared to over nearly 20 the prior days. Now I'm waiting for the market to stabilize so my bot can start trading again. I'm still researching how to handle a sudden spike in BTC or ETH.