Idioms and Idiomatic expressions

Today I thought I would compare three idioms that reference cash - since the economy is on so many minds.

cash in (something)
- to exchange coupons or bonds for their value in money
I cashed in a large number of my savings bonds in order to get some money to buy a car.

cash in on (something)
- to make money from an opportunity
The former basketball player cashed in on his popularity to open a very successful restaurant.

cash in one`s chips
- to exchange or sell something to get some money (from the chips used in a poker game)
I decided to cash in my chips and go back to school.

As you can see, they have three very different meanings.

The first can be most easily signed as "EXCHANGE". (available at aslpro.com)

The second may be best as "OPPORTUNITY"- the way I grew up signing it. Instead of the versions most of the online dictionaries have (initialized O-P from TRY), I learned it as if grabbing something off the palm of my hand, dominant hand open to closed as it brushes past the non-dominant palm. (If you cannot find an example on line, let me know and I will post one at you-tube).

Now the third one I thought meant something different, and found this definition at the freedictionary.com

cash in one's chips - pass from physical life and lose all bodily attributes and functions necessary to sustain life.

So if the third idiom "to cash in one's chips" means to sell soemthing off, like used in poker, then I would say it would be signed the same way as the first; EXCHANGE.

However, as I recall it being used, if someone "cashed in his chips" I would think DEAD.

Just my humble opinion.

Any disagreement?