Proof of Stake coins have a dormant period , (varies per coin design)
it may be that there are not enough non-dormant coins available to stake and maintain the blockspeed.
Noblecoin is one example of this , as it has days in between a few stakes.
https://chainz.cryptoid.info/nobl/
This is because the few that still have stake-able coins don't have their coins spread out into enough blocks to maintain the blockspeed.
Noblecoin difficulty is extremely low at 0.00071932  .
Meaning if a big holder came along and did not sync first, he could rewrite days of the blockchain by accident or on purpose.
or
Network has forked so badly , it can't choose the correct chain, and just refuses all new blocks.
(Requires paying a developer to add a checkpoint to fix.)


If you want to support a Proof of Stake coin,
1: You need enough coins staking to maintain the blockspeed and a decent difficulty to prevent history overwrites.
If you are unable to purchase any additional coins at an exchange , this is a hard task to accomplish

2. Running Block Explorer is required as no one can trust a coin without a 3rd party explorer running.

3. Paying an exchange listing fee,

4. Maintaining Nodes to sync new users

If you are not willing to do all 4 , then don't waste your time doing 1 , as all 4 are required.

FYI:
You are better off picking a Proof of Stake coin that
Is maintaining it's blockspeed.
Has a Block Explorer
Has an Exchange , (any exchange is working is all you really need.)
Has users already Maintaining nodes and providing a blockchain snapshot to speed up syncing


FYI2:
You can work at keeping a dead coin network running, but it will be expensive, and likely without reward.
Makes more sense to find a Live Coin Network and throw your support behind it.
Their are still many to choose from. However the weak ones will be dying over the next year or two in droves.

Translation campaign 10% : 500.000 LQO (maximum, upon reaching HardCap)

Well, doge was invented for meme, not for serious purpose. Unlike other coins, it is maybe the only coin with no greedy ambition and that's how people love DOGE. But, I think no one should consider this coin as a serious investment cause it has no real value.

single laptop with  Intel Core i5 processor

Do we need to keep our laptop open and run the mining for 3 days without any interruption?

Keep your computer/laptop network connections and power for about at least 3 days till the node light up

only available on Windows and Mac, mac version will be updated if you need it.