I'm trying to create this button in my views with a custom text, that needs to link to the current node.
I know you can use links and that works, but.. i need something like a variable that makes the link always go to the current node.
Content: Link allows you to enter
Text to display.
For more complex changes you can use the "Rewrite the output of this field" option on the "Content: Link" field. It's more reliable to use this field than Path.
You can use "Global: Custom text" field to construct some output (also "Rewrite the output of this field") using the tokens for the fields listed above it, but it isn't necessary in this case.