Which investment ideas are good?

So I was looking around the web for investment ideas and i came across a couple of ideas. First there is this company called primerica , this one sounds legit. They have a rule of 72 where your money doubles eventually, it says your money goes up by 14 to 18 % per year and they have statistics to back it up. Second there is Pacific tycoon, this one looks super sketchy, you buy a shipping container for about 5k and rent it out to the company and get a 12 fixed rate lease. I searched this one up , many say it a scam but many also say it works. So what are your opinions people, what have you heard?