To invest in a coin or any other project has more than just to think of buying and selling on exchanges
Every coin is a potential coin to expand if only It has the support of community and investors.
So I urge us all to invest with our instincts, never for once may we judge a swimmer by him standing only at the banks of a river. So take a risk, make a session and may it work for you.
My only advice is we should not test the depth of water with both feets or better said, never put all your eggs in one basket... All simply means we should not invest all or possession in one business, do not enter a single trade with all your assets
If I understand correctly you are saying we shouldn't put all our investment or hope in only a particular altcoin, well I have always believed in the diversification and it has helped me to not put all eggs in one basket