I think with that kind of question, you need to be really lucky or really good at speculation to find the exact coin that will "pump". Luckily, there is one other way to know: by researching promising coins and if you are tech savvy, this may be much easier to do than the previous two ways - and the one with the most solid trading strategy as well.
To minimise risk and get to invest in a good altcoin, what you need to do is to not go with some unnecessarily shilled coins or try to chase pump and dump schemes. Invest most of your portfolio on what you think the coin can provide as a technical solution to some problem that you deem significant.
To me, there are several coins that show this promise today: one of them being the Multiversum project. The idea behind the project is not only novel but also feasible and noteworthy. The team behind it is not well known, but I believe they are capable of delivering on their new blockchain 4.0 solution. Multiversum provides a new approach in providing a fualt tolerant blockchain, together with other security-based solutions.