To get the things going, you could even contribute by paying miner fee a bit higher than you usually pay, that will help get your transaction confirmed and let the network run smoothly...
It does help to make stress testing slightly more expensive and that's it. The difference that you're going to make is very small.
At least it makes some difference, whether small or large...
Small things help in making it large, so collect small and make it large...
Other things you can do is, keep some coins in your client and just put it on so that it might help the network...
That is for POS coins. Bitcoin is a POW coin. When running a full node, you are only contributing by relaying blocks (non pruning mode), transactions and enforcing the network rules. There is absolutely no difference in running a full node with or without any coins.
Sorry, I didn't mean to say it in that means...
I know Bitcoin is a PoW coin, but yes I thought running our client could help the network a bit, so thanks for clarifying...