I think investment and only one currency will not be profitable anymore in the situation so if you had a little money also you need to be a selective in multiple currencies to invest so I recommend investing and some good altcoins will be more useful to you to get the profits more higher than investing any single currency.
this is correct.
never put all your eggs in just one basket. spread the investment and minimize your risks.
trading is risky even for advanced traders, so better start with small amounts of
money you are ready to lose - if you make a mistake.
i personally would suggest this project for investment:
https://coinmarketcap.com/currencies/morpheus-labs/but that's only my opinion - DYOR (do your own research)