I'm thinking of starting with dollar cost averaging method.
The ones you running this for some time now, do you invest just in BTC or also other coins?
Lets say I want to put 100$ weekly, is it better to stick just with BTC or maybe to divide into 25$ to 4 different coins?
Every suggestion is much appreciated.
Obviously depends on the coins you want to put your money on, as of right now i wouldn't tell you not to. There's lots of altcoins coming up with great potential, you just need to filter out the ones that don't.
This is easier said then done ofcourse, so if you aren't willing to put in a lot of time and effort researching the coins, i would suggest to keep your funds in bitcoin.
I myself do keep alot of funds in altcoins in which i believe have great potential, but i am more often then not better off by just hodling bitcoin...