fonts - Why is my text is too large even when scaled to .05f in libGDX?

I'm trying to scale down my fonts as my game objects are also small.

I'd like to scale them down the same way as my sprites. However, if I scale them below .05, the font disappears!

My attempt at small, smooth text above an orange grid:

The code:

private void initTestObjects() {
        textures = new TextureAtlas(Gdx.files.internal("data/atlas.atlas"));//i am not using atlas params(for now -.-, I cut from texture..)

        //text texture and bitmapfont
        texturesText = new Texture(Gdx.files.internal("data/fonts_0.png"), true);
        texturesText.setFilter(Texture.TextureFilter.MipMapLinearNearest, Texture.TextureFilter.Linear);
        bitmapFonts = new BitmapFont(Gdx.files.internal("data/fonts.fnt"), new TextureRegion(texturesText), false);
        bitmapFonts.setScale(.1f);


        //grid texture and sprite
        TextureAtlas.AtlasRegion grid = textures.findRegion("grid");
        gridSprite = new Sprite(grid);
        gridSprite.setSize(SIZE, SIZE);//4x4
        gridSprite.setOrigin(gridSprite.getWidth() / 2, gridSprite.getHeight() / 2);
        gridSprite.setPosition(0 - gridSprite.getOriginX(), 0 - gridSprite.getOriginY());

        //players' textures
        o = textures.findRegion("o");
        x = textures.findRegion("x");


        line = textures.findRegion("line");
    }

What am I doing wrong?