Answer:
I am easy to waste. I am unstoppable. What am I?
I build bridges of silver and crowns of gold. What am I?
I am in the middle of water but am not an island.
I have wheels and flies yet I am not an aircraft.
I can be winding and I can be straight. I can be smooth and I can be rough. Sometimes both. I start out black but fade to brown. My favorite colors are yellow and white and I love stripes and dashed lines.
How do you know if a sniper likes you?