Good to have you here mate the right coin you can buy is bitcoin and if you continue following up and also consistent in the forum you will understand better about bitcoin investment and how you can start buying bitcoin, most at time some forks thinks buying bitcoin will be too expensive without knowing that one can be buying in fraction, there are different method to buy bitcoin but the dca method is a perfect one because even as a low income earner you can be buying as you can it can be weekly or by monthly with your discretionary income and also know that bitcoin price doesn't always increase some times it increase and some times it dip but don't get scared just keep buying and store.
Things are expensive to buy if they are useless but currently have too high prices but if they are valuable, it can be really worthy to buy them while temporarily or in short term, their prices can still be overvalued. Fortunately, because of their good values, with time and more new demands, price and value will have time to match each other.
In another word, in short term, price can be overvalued or undervalued than its true value but in long term, value must comes first and higher than price.