投资热的英文：
investment fever

Everybody is talking about the investment craze. But how can I get in on the action without anything to invest?
每个人都在谈投资热但是我没有什么东西可以投资,要怎样才能凑热闹呢？

invest material
覆盖材料

profits and losses on disposal of investments
转让投资的损益

He bought it purely as an investment.
他纯粹是作为投资而购买的。

Antiques are a very safe investment.
古玩是一种非常保险的投资对象。

Networking is an investment not a nuisance.
人际网络是一项投资而不是浪费。