Nope. The notation with braces is used, when one needs modification of the
value while expanding or the context doesn't indicate the end of the variable
name: `foo$barbaz` (expands var `barbaz`) and `foo${bar}bar` (expands only `bar`)

Example:
```sh
vars="foo bar"
for i in $vars; do
  echo $i
done
for i in ${vars}; do
  echo $i
done
for i in "$vars"; do
  echo $i
done
```

The first two print two lines each.