[amiraliakbari]

You really misused the term "coin". In Bitcoin protocol you don't "put value" into something named a "coin". "Wallet" is far more widely used and well-defined.

[celticninja]

I think 'address' is better. The value has been assigned to an address on the bitcoin network.

The value of the address is denoted in 'coins'

The holder of that 'address' is the owner of the coins.

Multiple 'addresses' controlled by the same owner would exist in a 'wallet'

[spuz]

The OP didn't misuse the term "coin". In Bitcoin it refers to the value of a single input or an output. When the OP says "Plunking this much value into a single coin seems like an odd strategy at best" they mean "Plunking this much value into a single unspent transaction output seems an odd strategy".

[kragen]

"Wallet" is widely used and well-defined, but it doesn't refer to something that can be observed in the blockchain. In the blockchain we can observe keys and scripts; a wallet is a usually-encrypted data file containing a potentially large number of keys.

[anticensor]

Bitcoin operates on transaction inputs and outputs, which work like coins in that their denomination do not change during spending.