Everything you have mentioned above will factor into how much I would invest into an Altcoin,
If it is a solid top 20 coin, that has been around for years, has growing functionality and real world use cases, then i would probably invest 5-10x as much into a coin like this than I would say an ICO who have a good team and roadmap but no current use cases or track record
I suggest you forget about the new project. You already have a good choice if you want to invest in top market assets. the new project is part of a scam on the crypto market. ICO or IEO is the same. choose the least risk. trade or investment that is already in the market.
You should not say all of IEO and ICO were scam. Almost all of icos have already started from ICO and IEO, how you can say like that when these kinds of fundraising have already helped crypto to be big like this time. There is a lot of trusted icos in the market. The problem is some of these icos were scam.