Will this strategy work? Sell alts or hold vs BTC

[camaund]

I have been following the price of BTC and alts and the correlation they have with each other. I am sure you know if BTC rises, alts go down (BTC not USD). If BTC goes down alts also go down (both BTC and USD). However in small instances when BTC is "stable" (around $1,000 USD variation) then alts go up in both USD and BTC prices. I dont care about USD price but I want to increase my BTC amount.

My question: Should I sell my XRP and LTC (and in general sell alts when for a week the price of them have gone up more than 50% vs BTC). and then buy them back once the price lowers vs BTC. Or is it better to hold the alts and not risk another jump in price?

Just as extra info, I only buy top 20 alts.