All the ones that you believe will be the best long term platform coins/tokens. Some privacy tokens are not bad also. The "big ones" are kind of an obvious thing  to own during a dip. I also believe in exchange tokens as well. If you are looking for something a little more ground floor entry level on their presale, this company is aiming to create the first crypto arbitrage exchange that also insures your personal crypto holdings which has never been done before!

https://bitcointalk.org/index.php?topic=3085831.0;all

What do you think about this project? Do you see the opportunity that exists with the "Kim Che" premium? Imagine the possibility of making a profit form the differences in price in crypto on different regionalized exchanges around the world directly from the safety and peace of mind of keeping your own private keys on your own wallet and even insuring your crypto holdings that you may choose to? What a different experience, this would eventually be something that would be useful to introduce people into crypto and protect and educate them to have a successful experience in crypto. 

*This is not financial advice just my opinion