Invest in Apple ! Or Intel or SAP .. you are basically looking for big companies who have crossed their youth and slowly losing vitality ..

Sell fraudulent shares in the company. It's all profit when the company fails. Ask Mel Brooks how it's done (*poorly):

IMDb

The Producers (1967) ⭐ 7.5 | Comedy, Music

1h 28m | PG

How about a long short

No, it has to be big... the big short. :anyasmug_sm:

Isn't a reverse investment called a 'loan'?

I think that's a put, you can pay a fee to be able to sell a stock at current price before a set date of your choosing. If it goes from say 5$ to 1$, you can buy it at 1$ and sell it for 5$, making $4 per stock minus the fees you paid (the longer period in the option the higher the fee).

Puts are also safer than a short. A short has potentially infinite losses, the worst you can lose on a put is the fee you paid up front.