Making decent money with any pre-made script in the crypto sector is not likely to happen and instead a huge amount of the automated ways to make money with Bitcoin scripts are just outright scams.
The crypto market is flooded with professional coders creating industrial-grade bots that eek out a few % a week and make them millions per year - these are your competition, and it's incredibly hard to build profitable, automated cryptocurrency bots today as a retail trader.
If someone is saying you can buy one off them for $ xxx and it will make you a lot of money there is almost a 90% chance it's a scam. Bitcoin isn't just something that you throw a bit of money at and it makes you rich, it's like anything else - you have to understand it and find ways to creatively exploit it in order to make money.