public function all()
{
    if (Cache::has('bus_stops')) {
        return Cache::get('bus_stops');
    }

    return $this->cacheBusStops();
}

public function create(...)
{
    // do the creation...

    $this->cacheBusStops();
    // or
    event(new BusStopCreated($busStop));
}

public function update(...)
{
    // do the updating...

    $this->cacheBusStops();

    // or

    event(new BusStopUpdated($busStop));
}

// either inside the repository for now
// or put inside a Listener maybe CacheBusStopsListener
protected function cacheBusStops()
{
    Cache::forever('bus_stops', BusStop::all());

    // you can use this in the UI to show the last updated of your record
    Cache::forever(
        'bus_stops_last_updated_at',
        (string) BusStop::orderBy('updated_at', 'desc')
            ->first()
            ->updated_at
    );

    return $stops;
}

EventServiceProvider
...
    $listens => [
        BusStopCreated::class => [CacheBusStopsListener::class],
        BusStopUpdated::class => [CacheBusStopsListener::class],
    ];