Is it possible to make $.100 per month by mining cryptocurrency on PC or Laptop

The decimal point was probably a typo but unfortunately it's much closer to the truth than the other number. If anything $0.10 per month or 1/3 of a cent a day - even that is much more than one could earn from mining bitcoins on a PC (let alone - on a laptop).

The block difficulty is now at 15 trillions. That means - you need 15 trillion KiloHash per second (or 15 PetaHash per second) to mine BTC 0.25 per day. (And it's going to be BTC 0.125 in just 3 months, as the block reward is to be halved again.)

Now, a typical CPU has the "hashing" power in tens of KiloHashes. A GPU can give you hundreds of KiloHashes. Let's assume you have a PC with some super duper GPU that can give you 1.5Mh/s. How much can you mine with it?

Let's calculate: Hashing power (1500Kh/s) divided by the block difficulty (15 trillion KiloHash), divided by 4 (as the block reward has already been halved twice), that amounts to 0.000,000,000,025 BTC a day. In other words:

• You will never be able to mine a block on your own
• If you join a pool, your contribution towards the mined block will be so negligible, that you won't get anything. (The smallest bitcoin amount is 1 satoshi or 0.000,000,01)

So here is your answer. Nobody can mine bitcoins on a PC, let alone a laptop. And, if you think about getting a miner, make sure you do some number crunching first or else your bitcoins may not even pay for all the power consumed by your miner - let alone for what it cost to purchase and deliver the miner itself.