January started to buy BTC, LTC, XRP every week using Revolut's vaults automatic savings. Others offering similar features are Bitpanda and Savedroid in Germany.
Interested in the mid to long term, cost averaging is the best investment strategy. I never worry about current price. The vault invests every week, same day. One day BTC, one day LTC, one day XRP. If the prices dip I am happy ... automatically buying at lower levels.