Most shipping companies in the stock market have rocketed in the past 2-3 months, so that opportunity has passed I think.
Ex: Bitcoin stocks (yes they're stocks / investment products) are only really reported on when they're at an all-time high. They may go up a little more if you're reading something fresh off the press, but it's not going to go up as much as it already has. I mean if you bought a year ago you could have had a 10x return on investment, if you invest now it'll be 10-20% return on investment at best.