If someone physically gets hold of your laptop (or other PC) it is generally still game-over for us. They can, for example, install a key-logger and learn your Keepass and Dropbox passwords the next time you enter them.
There are counter measures but they are awkward and most people don't use them. I use Encrypt Stick on a USB memory stick. If I am using a public PC I can engage a scrambled keyboard to enter my password -- every mouse click on an on-screen keyboard (internally encrypted) scrambles the key layout for the next click. Slow and annoying but 100% defeats key-loggers. However, if someone has a camera looking over my shoulder I can still lose.
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