When you are making billions in booming boxship markets like Germany's Hapag-Lloyd, it is hard to know how to spend it.

"The challenge we have a bit right now is that all the prices for anything you would be interested in are very much elevated," chief executive Rolf Habben Jansen tells TradeWinds.

"And I think in general it's not very good practice to go and buy very expensive assets because over time that tends to haunt you a bit."