To accrue 100k Instagram followers in just 48 hours, you must implement a strategic and highly targeted approach. Start by optimizing your Instagram profile to make it appealing to potential followers; this includes a clear profile picture, an engaging bio, and links to your website or other social media platforms. Next, create highly engaging and quality content that resonates with your target audience. Utilize Instagram features like reels, stories, and IGTV to diversify your content. Collaborate with influencers from your niche for shout-outs or exchanges, which can drastically increase your reach. Utilize relevant and trending hashtags to make your content discoverable. Run Instagram ads or promotions to reach a broader audience. Lastly, engage with your audience regularly by responding to comments and messages to foster a sense of community. Remember, while this strategy can potentially boost your followers significantly, it’s crucial to focus on consistency and authenticity for sustainable growth.