  Recent experiments have identified fascinating electronic orders in kagome
materials, including intriguing superconductivity, charge density wave (CDW)
and nematicity. In particular, some experimental evidence for AV$_3$Sb$_5$ (A =
K,Rb,Cs) and related kagome metals hints at the formation of orbital currents
in the charge density wave ordered regime, providing a mechanism for
spontaneous time-reversal symmetry breaking in the absence of local moments. In
this work, we comprehensively explore the competitive charge instabilities of
the spinless kagome lattice with inter-site Coulomb interactions at the
pure-sublattice van Hove filling. From the analysis of the charge
susceptibility, we find that, at the nesting vectors, while the onsite charge
order is dramatically suppressed, the bond charge orders are substantially
enhanced owing to the sublattice texture on the hexagonal Fermi surface.
Furthermore, we demonstrate that nearest-neighbor and next nearest-neighbor
bonds are characterized by significant intrinsic real and imaginary bond
fluctuations, respectively. The 2$\times$2 loop current order is thus favored
by the next nearest-neighbor Coulomb repulsion. Interestingly, increasing
interactions further leads to a nematic state with intra-cell sublattice
density modulation that breaks the $C_6$ rotational symmetry. We further
explore superconducting orders descending from onsite and bond charge
fluctuations, and discuss our model's implications on the experimental status
quo.
