I think the best investment tool is education, Invest in yourself, learn, there is a lot of information and tools you can use if you know what are you doing. The best is most of the information is available free of charge, don't follow gurus that sells you courses, follow your own path.
I think you misunderstood what OP wanted.
It also confusing at first when I read the title, if you check the first post, the tool OP talking is like an asset that is for investment, gold/coin (probably cryptocurrency).
So for me, you are in a cryptocurrency forum so it is normal you will get the cryptocurrency to answer the part OP. Which is also I admit and advise it.