It is very hard to sit all day long to find out new coin launch. Is there any way to know the latest coin in crypto market ? I only know about altcoincalendar.info but am not happy with it. please tell me what are the upcoming coins. obviously CPU and GPU mine able only coin
What are you mining right now?
Don't wait/look for the right coin. Be ready for it. In the end, it's not about the coin. It's about the miner. You'll find that you go down many dead ends with new coins. The ones that are promising will likely require at least a moderate understanding of mining software and the professional miners will jump on promising new coins before you can even connect your miner.
Test the waters though. I would recommend decred.org It launched just over 2 months ago. The network mining speed went to 4THs pretty much right away. It's only 5THs now so you may be able to mine a bit with gpu. My gpu cost ~$200.00 6 months ago and my return now is less than $.50 per day (I think). I haven't bothered to figure out the exact roi because I know the gpu is not going to pay for itself. It can be more efficient to buy coins rather than mine. Staking Decred has been more profitable for me.
I read about Decred around 1.5 months before launch from CoinDesk emails. It took a lot of effort (for me) to be ready at launch (i.e., practice on testnets just to see how you manage). I failed at the ethereum launch because I didn't prep on testnet and didn't understand the software.
